Sonic Chaos is my favorite 8-bit title in general. I also love Sonic 1 too, sure I know Chaos is slow and the levels are a bit short but I love the music and sprites. Plus it was the 8-bit title I played the most when I unlocked it in Sonic Adventure DX. (Yeah I know that's the Game Gear version, but you know it's literally identical to the SMS version aside from extra tracks, and better colors...) The only good thing I can say about Sonic Blast is the soundtrack is amazing, especially Blue Marine Zone's track. Sonic 1 is the most organized 8-bit game, in terms of hacking IMO. Plus the added zones, and gimmicks makes it a great title to play through. Sonic 2 is alright, I just felt that Green Hills should have been the first zone as intended, why they moved Underground and Green Hills around still baffles me. Spinball is meh, the music is fine but the gameplay is way too slow. IMO you're better off playing the 16-bit counterpart, the special stages are neat though at least. Other than that the rest of the game is identical to the 16-bit counterpart, aside from Toxic Caves being renamed to Toxic Pools.