Super Mario Bros/world
Mario Kart
Civilization
Sim City
Advance Wars
Fire Emblem
Tetris/Wetrix
Solitaire
Mine Sweeper
Punch-Out!!

(those also include any of the other games in the series)

EDIT: I'm sure I'll add more, as I just added one

CSS

Counter Strike Source
CoD4

halo and call of duty

Tetris and any RPG I like to start with. Something about hitting level 30 when I should be level 10 that makes it fun. Not mention trying to max out and collect everything in the game over and over. This is why Pokemon can become a nightmare. If my other Pokemon are level 40 I must make the new one I just got level 40 too! Must all be same level even if I never really use them to progress. Same with a lot of platformers.

Lots of games but here are some of them:

Zelda
Touhou
Chrono Trigger
Total War
Starcraft
Super Mario
Metroid
Tetris

FFX,MGS4

Metal Gear Solid 4. I could play that game on any given day and never get bored of the game.

Fallout 3 and I used to play the old Pokemon games alot at any given time.

As for the other games, I play them once and move on...

zelda
mario
mario kart
metroid
punch out
...

wait, there's a patern here... umh...