I was disappointed with the vanilla implementation of vampirism. It seemed the only two useful stages were stage 1, and stage 4.

At stage 1 you had minimal strengths, and minimal weaknesses. Stage 4 was the opposite, and you gain some good powers, while being attacked by everyone. The later stage powers (Embrace Of Shadows and Vampire Seduction) are only really useful to infiltrate a town while in stage 4, so that you can return to stage 1.

You would end up having to choose between stage 1 and 4, and switching between the two is a pain. Either wait for 72 hours, or feed on someone.

Long story short: Vanilla vampirism is a pain, has no clear objective, and actually gets in the way of playing the game. This mod is intended to make vampirism a viable play style with clear benefits and challenges.

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Reversed Vampirism is designed to make vamprisim fun, challenging, and intuitive while changing little to make it seamless with vanilla Skyrim, with a couple small tweaks for immersion sake. Nothing overpowered or fancy here, just a humble result of play testing.

All Stages (Unchanged from vanilla vampirism)
100% resistance to disease
100% resistance to poison
25% more powerful illusion spells
25% harder to detect while sneaking
Health, mana, stamina regeneration stunted 100% while in sunlight

Stage 1 (just fed)
100% frost resistance
25% fire weakness
-15 health, stamina, mana while in sun
Vampiric Drain (5 pts/sec)
Vampire's Servant (Very powerful)

Stage 2
75% frost resistance
50% fire weakness
-30 health, stamina, mana while in sun
Vampiric Drain (4 pts/sec)
Vampire's Servant (Less powerful)

Stage 3
50% frost resistance
75% fire weakness
-45 health, stamina, mana while in sun
Sun Damage (2 pt/sec)
Vampiric Drain (3 pts/sec)
Vampire's Servant (Weak)

Stage 4
25% frost resistance
100% fire weakness
-60 health, stamina, mana while in sun
Sun Damage (4 pt/sec)
Vampiric Drain (2 pts/sec)
Vampire's Servant (Very weak)
Vampire's Seduction
Embrace of Shadows
Attacked by everyone