Here's my list from what I've played:

STH: Spring Yard Zone
S2: Emerald Hill
S3: Carnival Night
S&K: Flying Battery
SCD: Sonic Boom & Stardust Speedway (Future)
Spin: Toxic...something...Level 1, basically
3D: Lava Volcano Zone? Something Lava, I think.
SA: Open Your Heart
SA2: City Escape & Pumpkin Hill
SRush: Wrapped in Black
SRacing: Super Sonic Racing

My favorite is whatever Sonic's theme song is on SA2. I also like Open Your Heart from SA and the main theme on Sonic Heroes. Hey, I found out that almost every song on the Sonic games were made by a band called Crush 40.

This topic shouldn't die! I know SOMEONE has favorites!

This is funny......Looks like we are the only ones that like the songs.....

I haven't played enough of the Sonic games to name favorites. Heck, never even beat any of them.

Oh, yeah. Sonic fan over here!

I agree almost completely with Ix. I got to say that the sonic mega collection plus game was one of the best 30 bucks I've ever spent.
Oh, there's another artist besides Crush 40. And he's Julien K. I know he'd done a few. But I have to say that SA2 had the best music. I ended up downloading halfs the soundtrack the next day. But I think that Sega has slacked off as of Sonic Hero's. The only two I thought were really awsome was Team Darks theme and the song for their credits "This Machine".

sonicA opening an heroe

I Am All of Me and All Hail Shadow from Shadow the Hedgehog and Open Your Heart from SA1.