and of course the obvious choice is starl ight zone 

https://youtu.be/3mqmN6mw4R8

mega drive had the best sonic music imo  

old school sonic ftw 

smooth mcgroove did an amazing job with his star light zone Acapella
https://youtu.be/nNSzOHRsLL8

lol we had one of these threads a few months back.
Seeing as im lazy and on mobile I will just say that Crush 40 are amazing and are the best part of any "modern" Sonic
Also a fan of some of the Sonic R tracks

Definitely the music from Sonic Colors and Sonic Adventure 1 & 2!

Too many to list!

Sonic CD

With Sonic 3 & Knuckles and Sonic 2 a close shared second.

I never got the appeal of Starlight zone tbh. The zone and its music felt too bland and out of place in that game. It all felt like filler before scrap brain.

UGH, do I have to pick just one?!? They're all so amazing!!!! Bolded are my favorite tracks in each game
You can never go wrong with the Classic Sonic Soundtracks:
Sonic 1: Green Hill Zone, Spring Yard Zone, Scrap Brain Zone.
Sonic CD (Japanese): Sonic Boom, Stardust Speedway, Palmtree Panic
Sonic 2: Emerald Hill Zone, Chemical Plant Zone, Mystic Cave Zone, Metropolis Zone (But God Damn, FUCK those Slicers!)
Sonic 3 & Knuckles: Marble Garden Zone, Lava Reef Zone, Hydrocity Zone, Sky Sanctuary Zone, Flying Batter Zone, Doomsday Zone
(A Soundtrack that is rumored to have been made by the Late, Great, Legendary King of Pop himself!!)
I mean, they sound verrry similar!
Hydrocity - BAD: https://www.youtube.com/watch?v=5Gk4cIt0HBs
Ice Cap - Smooth Criminal: https://www.youtube.com/watch?v=_UGrbk2jKss
Marble Garden - Thriller: https://www.youtube.com/watch?v=ZJOmJxM8Rx4
Carnival Night - Jam: https://www.youtube.com/watch?v=ZxtFoe-at0E

Then the DreamCast era:
Sonc Adventure: Emerald Coast, Windy Valley Phase 2, Speed Highway Phases 1 & 3, Ice Cap Phase 2, Red Mountain Phase 2, It Doesn't Matter, Believe in Myself, Unknown from M.E., Open Your Heart
Sonic Adventure 2: City Escape, Metal Harbor, Pyramid Cave, Radical Highway, Sky Rail, Death Chamber, It Doesn't Matter (remix), Throw It All Away, I AM THE EGGMAN, Live and Learn
Sonic Heroes: Seaside Hill, Ocean Palace, Casino Park, Rail Canyon, Frog Forest, Hang Castle, Egg Fleet, Final Fortress, What I'm Made Of

Even the Modern Era has produced awesome tracks!
Sonic the Hedgehog (2006): Crisis City, Kingdom Valley, White Acropolis, All Hail Shadow (Crush 40 version), Dreams of an Absolution, Sweet Dreams, His World (ALL VERSIONS)
Sonic & the Secret Rings: Sand Oasis, Night Palace, Evil Foundry (COBI!), It Has Come To This, Seven Rings in Hand
Sonic Unleashed: Windmill Isle Day, Dragon Road Day, Spagonia Day, Rooftop Run Day, Shamar Night, Jungle Joyride Day, Endless Possibilities
Sonic & the Black Knight: Misty Lake, Knight of the Wind, With Me (both versions), Fight the Knight, Through the Fire, Live Life
Sonic Colors: Planet Wisp Act 1, Aquarium Park Acts 1 & 2, the Orchestral Remix of Reach for the Stars vs. Eggman,
Sonic Generations: Classic Green Hill, Modern Speed Highway, Classic City Escape, Modern Crisis City, Modern Rooftop Run, Open Your Heart remix
Oh God, this is a fucking tough question to answer!!!
If I had to choose just one, above the rest... I have to go with (hesitantly) Sonic Heroes.

Hi guys,

I used to play Sonic with my brother. Here is my favorite:https://www.youtube.com/watch?v=cDd_GlynA6A&index=4&list=PLE96216104AC190FF