as of version 1.029 I added information of non-cosmetic changes; 
most NPCs have their headgear removed. some fixes from USSEP (that don't require USSEP itself as master) are forwarded. some NPCs have their mood value set to Neutral.
if you don't like the changes, feel free to patch them out yourself.
note that some NPCs that are labeled as "marriageable" would still not be marriageable without mods that increase their disposition towards the player, like Missives Raise Disposition or Sidequests of Skyrim.

• Adrianne Avenicci (Whiterun)
• Aduri Sarethi (Sarethi Farm, the Rift)
• Aerin (Riften) -- marriagable. turned his Mjoll-following package into sandboxing around the marketplace.
• Ahlam (Whiterun)
• Aia Arria (Solitude)
• Aicantar (Markarth) -- marriagable.
• Alessandra (Riften) -- marriagable.
• Alexia Vici (Solitude)
• Alfhild Battle-Born (Whiterun)
• Alva (Morthal)
• Angeline Morrard (Solitude) -- changed to ElderRace.
• Angi (camp south of Falkreath) -- marriagable.
• Annekke Crag-Jumper (Darkwater Crossing)
• Anoriath (Whiterun) -- marriagable.
• Anska (adventurer at High Gate Ruins) -- unhooked her from the bandit wizard template, she now levels with the player (0.75 lv mult), doesn't affect the stealth meter and has her own spells. added perks and loot. based on BUVARP, mostly.
• Anuriel (Riften)
• Anwen (Markarth)
• Arcadia (Whiterun)
• Arivanya (Windhelm)
• Arvel the Swift (thief at Bleak Falls Barrow) -- added perks and made him level with the player (0.75 lv mult). based on BUVARP.
• Avrusa Sarethi (Sarethi Farm, the Rift)
• Fjola (Mistwatch) -- unhooked the Use Traits flag so she can have a unique facegen.
• Beitild (Dawnstar)
• Bergritte Battle-Born (Whiterun)
• Betrid SIlver-Blood (Markarth)
• Birna (Winterhold)
• Bothela (Markarth) -- changed to ElderRace
• Boti (Ivarstead)
• Braig (Markarth)
• Brelas (Thalmor Embassy)
• Brina Merilis (Dawnstar)
• Bryling (Solitude)
• Camilla Valerius (Riverwood)
• Carlotta Valentia (Whiterun)
• Constance Michel (Riften)
• Corpulus Vinius (Solitude)
• Cosnach (Markarth) -- added perks, removed level cap, changed his combat style to Ranged Conjurer and added bow + arrows plus Conjure Flame Atronach and Conjure Familiar spells)
• Curwe (Loreius Farm, Whiterun)
• Danica Pure-Spring (Whiterun)
• Dinya (Riften)
• Dorian (Solitude) -- had to forward USSEP's leveling fix because it's atrocious. changed to ImperialRace.
• Drifa (Riften)
• Duach (Markarth) -- marriagable.
• Eisa Blackthorn (bandit at Frostmere Crypt) -- unhooked from the leveled bandit template and given perks. based on BUVARP.
• Elda (Windhelm)
• Elisif the Fair (Solitude)
• Elrindir (Whiterun) -- marriagable.
• Eltrys (Markarth)
• Endarie (Solitude) -- marriagable.
• Eola (Markarth) -- marriagable. added perks. changed her combat style so she can utilize both archery and magic in battle.
• Erandur (Dawnstar) -- marriagable. added healing spells and perks.
• Erik and Erik the Slayer (Rorikstead) -- marriagable. added perks.
• Eris (Solitude)
• Evette San (Solitude)
• Faendal (Riverwood) -- marriagable. removed level cap. set as protected. added perks.
• Faida (Dragon Bridge)
• Faleen (Markarth)
• Fastred (Ivarstead)
• Frabbi (Markarth)
• Fralia Gray-Mane (Whiterun)
• Freir (Solitude)
• Frida (Dawnstar)
• Frightened Woman (radiant encounter)
• Gerdur (Riverwood)
• Gisli (Solitude) -- marriagable.
• Golldir (Hillgrund's Tomb) -- marriagable. added Lightfoot and Juggernaut40. removed level cap. set him as Unique (because he's lacking that flag, for some bizarre reason)
• Grelka (Riften)
• Grelod the Kind (Riften)
• Greta (Solitude)
• Gwilin (Ivarstead) -- marriagable.
• Haelga (Riften)
• Hamal (Markarth)
• Haran (Winterhold)
• Hemming Black-Briar (Riften)
• Hillevi Cruel-Sea (Windhelm)
• Hroki (Markarth)
• Hulda (Whiterun)
• Idesa Sadri (Windhelm)
• Idgrod Ravencrone (Morthal)
• Idgrod the Younger (Morthhal)
• Illdi (Solitude)
• Illia (witch at Darklight Tower) -- unhooked her from the leveled wizard template and given her proper spells. added perks. marriagable.
• Imedhnain (Markarth)
• Indaryn (Riften)
• Inge Six Fingers (Solitude)
• Ingun Black-Briar (Riften) -- marriagable.
• Irileth (Whiterun) -- removed level cap. set level mult to 1.0
• Isabelle Rolaine (found at Hob's Fall Cave. don't ask)
• Jala (Solitude)
• Jenassa (Whiterun) -- removed opposite gender anim flag.
• Jonna (Morthal)
• Julienne Lylvieve (Dragon Bridge)
• Karita (Dawnstar)
• Katla (Solitude)
• Keeper Carcette (Vigilant of Stendarr)
• Kerah (Markarth)
• Laila Law-Giver (Riften)
• Lami (Morthal)
  
  
• Lisbet (Markarth)
• Lisette (Solitude)
• Luaffyn (Windhelm)
• Lydia (Whiterun) -- marriagable. added perks. forwarded the USSEP sandbox package fix.
• Lynly Star-Sung (Ivarstead) -- marriagable.
• Madena (Dawnstar)
• Margret ((Markarth)
• Marise Aravel (Riften)
• Maurice Jondrelle (Whiterun) -- added healing and some basic weapons, but made his confidence Cowardly... idk. if you want a better Maurice, grab BUVARP.
• Maven Black-Briar (Riften)
• Medresi Dran (adventurer at Angarvunde)
• Michel Lylyvieve (Dragon Bridge)
• Mjoll the Lioness (Riften)
• Muiri (Markarth)
• Narri (Falkreath)
• Nenya (Falkreath)
• Nilsine Shatter-Shield (Windhelm)
• Niluva Hlaalu (Riften)
• Nimphaneth (Namira coven) -- set her as Unique, just in case.
• Niranye (Windhelm) -- marriagable.
• Nura Snow-Shod (Riften)
• Nurelion (Windhelm) -- made him an Alchemy trainer. based on BUVARP.
• Odvan (Markarth)
• Olava the Feeble (Whiterun)
• Olda (Dragon Bridge)
• Olfina Gray-Mane (Whiterun)
• Orla (Markarth)
• Pantea Ateia (Solitude)
• Perth (Soljund's Sinkhole, the Reach)
• Quintus Navale (Windhelm)
• Reldith (Rorikstead)
• Revyn Sadri (Windhelm)
• Rhiada (Markarth)
• Romlyn Dreth (Windhelm)
• Saadia (Whiterun) -- marriagable.
• Sabine Nytte (Solitude)
• Safia (Solitude) -- raised her level cap to 100.
• Salma (adventurer at Ironbind Barrow) -- raised her level cap to 60. added Lightfoot, plus a bow and some arrows.
• Senna (Markarth)
• Seren (Dawnstar)
• Sibbi Black-Briar (Riften)
• Sigrid (Riverwood)
• Silana Petreia (Solitude) -- marriagable.
• Silda the Unseen (Windhelm)
• Sondas Drenim (Darkwater Crossing)
• Sorex VInius (Solitude)
• Susanna the WIcked (Windhelm)
• Suvaris Atheron (Windhelm)
• Svana Far-Shield (Riften) -- marriagable.
• Sven (Riverwood) -- set as protected, removed level cap, adjusted leveling mult to 1.0. added perks and made him a Speechcraft trainer. based on BUVARP. marriagable.
• Sybille Stentor (Solitude)
• Sylgja (Shor's Stone)
• Taarie (Solitude)
• Talsgar the Wanderer (radiant encounter)
• Tekla (Falkreath)
• Temba Wide-Arm (Ivarstead)
• Tilma the Haggard (Whiterun)
• Tormir (Darkwater Crossing)
• Tova Shatter-Shieild (Windhelm)
• Tythis Ulen (Riften) -- marriagable.
• Uaile (Markarth)
• Ungrien (Riften)
• Uraccen (Markarth)
• Uthgerd the Unbroken (Whiterun) -- added perks. removed level cap and slightly buffed health and stamina.
• Valdr (hunter at Moss Mother cavern) -- added perks.
• Valga Vinicia (Falkreath)
• Valindor (Ivarstead) -- marriagable.
• Velehk Sain (Dremora pirate at the Midden)
• Viola Giordano (Windhelm)
• Vittoria Vici (Solitude)
• Vivienne Onis (Solitude) -- marriagable.
• Voada (Markarth)
• Wylandriah (Riften) -- added spells.
• Ysolda (Whiterun)
• Zaria (Falkreath) -- marriagable.
• Unnamed female Imperial hunter at the hotspring near Eldergleam
• Unnamed female Redguard hunter at the hotspring
• Unnamed male Nord hunter at the hotspring