In particular order. Cross posted from my comment at Huge Ruined Pile
1. D&D 3.5
2. Call of Cthulhu (6th & d20)
3. Swords & Wizardry
4. Might and Magic VI and VII
5. Heroes of Might and Magic II and III
7. Final Fantasy I, IV, V, and VI
8. Baldur's Gate I
9. Elder Scrolls II, III, and IV
10. Fallout 1 and 3
11. Star Wars: Saga Edition
12. Mage: the Awakening
13. WFRP (2e)
15. Mongoose RuneQuest
Honorable mention: Legend of Dragoon (my first console RPG), Star Craft, and AD&D (1st).
I'm definitely leaving some stuff out, just not sure what.