Do you keep your games or trade them in?

[StokedUp]

i keep ones that i really enjoy and trade ones that i enjoyed but just not as much as the ones that i keep.
for instance, heres a list of al the ps3 games i own and ive owned but traded in.

:::I OWN AND ARE KEEPING:::
Uncharted
Uncharted 2
bayonetta
final fantasy 13
Red Dead Redemption
Fallout 3
Star Ocean Last Hope International Edition
Metal Gear solid 4
Warhawk
Demons Souls
Valkyria Chronicles
Modnation Racers
Assassins creed 2
Bioshock
Ratchet and Clank: tools of destruction


:::IVE OWNED BUT HAVE TRADED IN:::
Call of duty modern warfare
Call of duty modern warfare 2
Call of duty world at war
Heavy Rain
Dead Space
Resident evil 5
Viking: battle for asgard
Guiar hero 4
Rock band 2
Resistance Fall of man
Resistance 2
Motorstorm
Assassins creed
Killzone 2 (( regret trading this one ))
Eldar scroll: Oblivion (( regret trading this one ))
Disgaea 3


i think thats all of them. sorry for the list :)