As someone who has no friends to play mmos with, the old republic is a really fun big single player rpg with some multiplayer parts. I play it kinda like a mix between kotor and dark souls, only grouping up for flashpoints or heroics. I don't really join guilds or anything. Having said this if this wasn't a star wars game I probably would have zero interest. I just love being a roguish smuggler dude right now. The only story I have played fully is the imp agent and it was very awesome.
I grabbed Enslaved and Spelunky because I have never played either and I'm pretty starved for stuff to play right now. Seems like some good deals! Being a plus member pays itself off within like the first two months.