I'm having trouble calling N64 games classic at this point still. Though, aside from about 20-30 gems I would say by and large it felt like a learning exercise for Nintendo learning to handle 3d graphics because a lot of the games had poor camera handling, bad game play and just felt lacking. Airboarders, Cruisin series, Aidyn Cronicles, Quest 64, so many horrible games.
I'll agree that there are lots of good looking games though, and I personally feel like you can render them to an exceptional quality using P64 - Mario 64, Starfox 64, Blitz, BattleTanks, Zelda:OOC. All worth looking into.