It's a mark of how good the old games were that Sonic is considered this awful, dead franchise now.
There have only ever been three bad Sonic games: 06, Shadow and, for my money, Heroes.
Adventures, the Wii games, the Advance games: all range from good to great.
--
http://img.imgcake.com/22763810150194882301443717534644274676943735581nmu.jpg