Drift/Drift2 for the lose. The number of times I tried either one (all on SADX), I found them very difficult and nearly impossible to control. Plus, it's hard enough to even see what's going on in the first one.
Labyrinth I enjoyed; it makes a very good puzzle game. Yes there is speed - in the spindash move; the puzzle is using it correctly to beat the level in the best time possible.
Spinball is one of my all-time favorites, even from someone who usually doesn't care much for pinball. Pinball, in my opinion is mostly a chance game, as all you can control is a couple of flippers; Spinball allows you to move the ball (Sonic) with the controls to fine-tune the motions.
Heroes I also liked a lot; it was a 3D game that pretty accurately conveyed the speed and action of the 2D games. The only game I've played that did better to emulate the 2D feeling is SRB2.
Shadow I've never played, but would really like to. I've seen gameplay videos (from experts, yes, but still videos from the game) that make it one of the most entertaining games I've ever watched. I at least want to try it before negating it, especially after noticing that I like a lot of things that others hate.
I also want to try Flickies Island (3D Blast for the uninformed) before verdicting that as well. In any case, Sonic Drift and Sonic Drift 2 are among the worst games I've ever played, and are the absolute worst Sonic games from that category.