Combination of time, & too many choices. Sometimes I'm convinced to buy the game because of all the marketing, magazine recommendations & cheap offers. In the end after buying them some are left unsealed and haven't even started yet. Example bought COD : Black Ops 5 months ago but haven't had time to play it yet. Did open the box to check the premiums though (it was the Prestige Edition). Last count I have around 60 games (including PSN ones) but completed only about 15 of them.

That's why I am selling some of them (imagine starting up Oblivion GOTY - pure time killer).

Started or halfway through but got distracted includes :
1. Castlevania LOS
2. Enslaved
3. NFS Hot Pursuit
4. Fallout 3 GOTY (also got New Vegas but yet to start).
5. COD Modern Warfare 2
6. Little Big Planet
7. Bayonetta
8. Valkyia Chronicles