I also loved the Genesis, but the Nintendo 64 was very good. All Rareware games were good, except Banjo and Konker games. Sadly no good Donkey Kong Games Have been released since Donkey Kong 64.
Sonic The Hedgehog was definitely The Sega Genesis's strong point though. They were really smart to put in the "up, down, left, right, A, Start," code off of the starting screen for Sonic The Hedgehog, otherwise I would have never finished the game because it is way too long to finish in one sitting and the Genesis overheats when you leave it on for hours on end.