I've posted my Wario over Knuckles WiP on GameBanana because I figured it would be a popular mod that would get some interest in it. I'm still relatively new to SA2 modding, and playing with its quirks that I'm aware of is hell.
I've dreaded revisiting Security Hall in Sonic Adventure 2 since that stage I found the most difficult to clear in Story Mode and lost the most lives, back when I played it on a GameCube.
I've tried it again, and I...actually cleared it with an A rank in my first try with at least a minute left over, then I actually replayed it some other times and also got A-ranks. ....wow, I think I have vastly improved than when I first played that level.
Also, cleared all stages in Death Chamber with an A rank. Still really like the stage. Pumpkin Hill is also warming up to me as I'm starting to learn where the pieces are typically hidden in. Meteor Herd too. I think Aquatic Mine would soon be my least favorite but I still don't think it's that bad of a stage.
Tails/Eggman stages are pretty mindless as far as this game goes if you're getting good ranks. Just shoot a lot of people, spin your vehicle in a 360 angle to get everyone in sight and blast through the level. I don't mind it too much, actually but it is pretty shallow. Gotten easy A-ranks for this simple strategy.
Sonic/Shadow stages, they're okay. Not my favorite though, as I have the most difficult time with them and...idk I don't think I can get quite the groove to speed through things as them as it's...simply not as satisfying to me as other Sonic fans enjoy these levels. I did A rank the story stage of the jungle level though.