I guess I've seen quite a few films based on computer games, but I don't know the games so I don't have any preconceptions.
I like the Resident Evil films - there you go, some cheesy rubbish I did enjoy! - but the presence of Milla Jovovich helps.
I had high hopes for Silent Hill, but it was a little disappointing.
The rest were all rubbish, as far as I can remember (is Hitman a computer game?).