Sonic racing transformed was right up there with my favorites, modNation racers was another. I played this at Gamescom a year ago, didn't impress me much. Looks to have improved a lot though. Just wish it was all Sega, rather than just Sonic.
I miss ModNation Racers, I spent so much time making tracks and decorating the environments lol... would love someone to pick it up again and make a sequel or something similar (No, not LittleBigPlanet Karting, that doesn't count and despite basically being the same thing, wasn't even close to being as good)
As for Team Sonic Racing, it really is a shame it's strictly Sonic only, especially coming after the earlier Sonic Racing games that were fan-fucking-tastic and in my opinion could very easily have gone toe to toe with the Mario Kart franchise... oh well, this doesn't look too bad I suppose, definitely looks better than the video from last year, but something about it just doesn't seem... right. Also it still looks too slow for my liking, although that could be to do with the difficulty it's being played on, I mean, they very easily took and maintained first place the entire race, so who knows.