There are a lot of good games out there, but If I had to pick a certain amount, say... 10? I would choose these games.

Snes:

Super Mario World

Super Metroid

UniRacers

Mario Paint

Chrono Trigger

Earthbound

Mechwarrior 3050

Super Mario Kart

Super Street Fighter II Turbo

and Donkey Kong Country

3DO

Road Rash

Corpse Killer

Who the hell am I kidding? There are barely any good games for the 3DO...

Genesis:

Sonic and Knuckles

Boogerman: A Pick and Flick Adventure

Sonic 3D Blast

Earthworm Jim

Sonic The Hedgehog 2

Sonic Spinball

Gunstar Heros

Ecco the Dolphin

Bubsy in: Clawed incounters of the Third Kind

and Marble Madness

Wii

Donkey Kong Country Returns

Klonoa: Door to Phantomile

New Super Mario Bros. Wii

Wii Fit Plus

Wii Sports Resort

SqueeBalls

Super Smash Bros. Brawl

No More Heros

Animal Crossing: City Folks

not much else....

That is all for now. Will come back later... What about you?