Perfect? None.
Games that I'd round up to a 10/10: (roughly 96-99 on a hundred point scale)
The Legend of Zelda: Ocarina of Time...no need to elaborate on that one.
Metroid Prime (so far, anyway. I've just started it, but besides a few small problems with the tutorial, I haven't found any problems with it. Playing the Wii version incase anyone's wondering...)
Left 4 Dead (biggest issue is the freaking survivor AI--it somehow manages to screw me over no matter which side I'm playing in versus...but, still--rounding)
Portal. Kind of short, took me a while to think of "portaling" a missle into the cube tube (The tubes are destructable...the ONE thing they forgot to cover in the tutorial).
Minecraft. Not much in the area of actual goals, but you can make your own. Besides, it's neat to see a game made almost entirely out of a customizable/destructable environment.
Morrowind. Crappy combat, but a helpful glitch fixed that right up (go to Balmora, get that sword from the kitty's shop, summon sword that buffs sword stat, swap weapons and the game keeps the stat boost permantly. Long Sword skill of over 1000 within the first few minutes

). The amount of detail is amazing...houses are cluttered, cultures in conflict, ect.
Chrono Trigger. I honestly don't have a complaint...but I'm sure someone can think of a minor flaw. And while I'm listing SNES, which is home to several games that I have no complaints for....
Super Mario World (one giant world map, so many secrets in the levels, a secret world, a second secret world unlocked for finishing the secret world, and yoshi? Awesome)
The Legend of Zelda: A Link to the Past (Gameplay from Zelda 1...just bigger and better...with two worlds, towns, and some great boss fights)
Super Metroid (hard to elaborate on this one, since this is the earliest Metroid I've played. Seems to be, like Mario World and LttP, the perfection of the original formula and gameplay).