I was having a discussion with a couple of mates, about the type of games we enjoyed, and it became clear that one of them really only played games with engrossing stories - stuff like The Last of Us, Heavy Rain, Telltale games etc. He didn't really ever play anything else - and was a bit snobbish about games that didn't have a story.
The other guy mainly likes RPG's - stuff like Fallout, Skyrim, stuff where you level up and spend hours questing - and anything shooty, although he doesn't play online shooters at all.
Myself, i haven't really identified what kind of game i like. I don't think story-lines interest me much - i tend to gloss over cutscenes, and forget all the names and things, but i like games that you can pick up and play, as i don't get lots of time to play.
Generally i think i like games with interesting mechanics, or games where you have loads of choice to play in whatever way you like - mostly open world games. I like exploring interesting environments and generally mucking about.
It's weird that for three people who are really into games, we don't have that much overlap at all.
So what do people here generally look for in a game, first and foremost? Gameplay, graphics, competition, replayability, voice-chat?