Power Stone
Hydro Thunder
Vigilante 8 part 2
Sonic Adveture
Sonic Heroes
Rhythm Thief & the Emperor's Treasure
sonic and the Black Knight
Those are my Sega recommendations.
I have been playing PS2 GC GBA DS 3DS.
My 3 favorite systems are PS2 & Dreamcast & 3DS.....I also liked the GameCube. Wii U E3 Videos sold me on Wii U.
I don't care for the PS3 & Wii & PSP, but I do like the WiiMote Plus+Nunchuck controls.