star light zone was and still my favorite sonic ost
Its hard to choose one - there's so many good ones.
City Escape (Both Sonic Generations Classic and the Sonic Adventure 2 Original)
Open Your Heart (Sonic Adventure 1/Sonic Generations)
Casino Night Zone Pinball DLC (Sonic Generations)
Gallery Theme (Sonic Generations)
Metal Sonic's Theme (Sonic the Hedgehog 4 Episode 2)
If Knuckles Chaotix counts:
If it doesn't,
Edit: There's too many good ones
Edit Again...(Hey, I love Sonic music)
A guilty pleasure of mine:
Bet with Adamblaziken:
I bet that on launch the Nintendo Switch will have no built in in-game voice chat. He bets that it will. The winner gets six months of avatar control over the other user.
Music is the one thing that Sonic games (almost) consistently excel at. I have a few tracks in particular that I love.
If I had to pick one though, I'd say Stardust Speedway Bad Future JP. That song is just the 90's condensed into one song, and I'm a sucker for a nice piano track. I will say though that Reach for the Stars is ridiculously cheesy and I love it.