I would add the Unchaarted series to that list. I would go get 1 and play them in order but that is just me.
A lot of people seem to like the God of War serries(hack and slash) and Infamous (dark supper hero RPGs).i'm not big on either but they seem to have a pretty big following. You can also download and play DC Universe online(mmo) off PSN and play for free. The game is a huge download so do it through the night if you want to try it. For free I would say it's worth a shot.