Sonic 1: You like simple elegant things.
Sonic 2: You like attitude and believe bigger is better.
Sonic 3: You love anime.
Sonic & Knuckles: You enjoy action movies.
Sonic Adventure: Your dream game is a Sonic RPG.
Sonic Adventure 2: You again like attitude but this time some edge to it (soap shoes and Shadow).
Sonic Heroes: You fall for gimmicky things.
Shadow The Hedgehog: You have a great sense of humor.
My favorite is Adventure 2, but I'm curious what you'd say about Sonic CD
Seriously Sonic CD is great, but you have to understand where the game was coming from and how you should play it.