These days I keep the vast majority of my games. I regret selling games I owned in the past, so it's rare that I do it nowadays.

yeah b.c if i sell it it is like worth 5 dollars so might as well keep it
in case i want to play wi fi w. friends er do sumthing else w. it

I've only ever sold one game - CoD3 on the PS3. Such a boring game.

Yes, I've never sold a game. Though I am currently wondering whether I should sell some... then again, if the game was good, I'll almost always come back to it sooner or later, and if it wasn't or is too old, it's not worth anything and thus not worth selling.

It really depends on if it is a good game or not. Down the line and I need cash then yes I will probably try to get some cash out of the crappier ones that I would have absolutely no chance of playing again.

I usually keep them.. but Gamestop is having all sorts of deals on trade-ins toward Mario Kart so I'll probably sell The Simpsons DS game or Sonic Heros or something.

I've never sold a game, just doesn't seem worth it.

I keep them. I've only ever gotten rid of 2 games that I didn't really like.

I'm keeping all my good games. I've been buying alot of Cube-games for 10$ the last few months. All gems like Viewtiful Joe, Eternal Darkness, Soul Calibur 2 and Beyond Good and Evil. I'm definitely NOT selling those titles because i like to have a 'complete' collection of what that particular console had to offer! I'm actually looking for those gems. For example the Gamecube, i've been getting like 12 games in the last 6 months, just because they rock and i want a really diverse and good AAA-collection. And nowadays you can get that cheap!... When i was younger i made a few 'mistakes' with the games bought. Mistakes are the games that i really didn't enjoy and had MEDIOCRE written all over it! Games like Goldeneye: Rogue Agent for the Gamecube or Medal of Honor: European Assault. They are the games that i Did sell! But like i said earlier in this post; I like to have a collection of GOOD games. The bad ones i can sell for 5-10$ and nowadays you can pick up a Cube-gem for 10-15$... So quite a good deal if i say so!

There are not many games that I keep. In fact, the Wii is the first system I have owned where I have kept several games because of the party replay aspect. I buy most of my games on eBay and then sell them on there after beating them. The only games that I buy new are the big titles that I want on launch day (SMG, SSBB, Wii Fit, MKWii).