I'm generally a collector, I will ONLY trade in games if they're atrocious....and EB Games has a trade in bonus going on.
For example: I have games like Damnation and Lost Planet 2 in my collection, both considered evil, terrible games, I keep them. I have games I barely play, some of which I haven't played yet.
BUT recently I went to EB Games with 5 PS3 games, because they had +50% credit towards pre-orders.
The games and the reasons were:
Atelier Rorona and Cross Edge (I tried SO HARD to love these games, they had a good pedigree and systems and everything...but I couldn't deal with the combat)
Dark Void (I finished it, and I saw no replayability in it, which was an enjoyable experience, but I couldn't play it again)
Haze (Same as Dark Void really, and the ending really disappointed me because they could have changed it slightly and it would have been amazing)
Transformers: War for Cybertron (I enjoyed it, I just didn't need it anymore, I don't play online, the controls were unweildy at times, and just...ehhh)
Got $116 from it, and with the $40 I got from cancelling my Skyrim preorder *raises flame shield* I paid off Ico Collection, Disgaea 4, and a good chunk of Assault Horizon.