MMOs, RPGs, open world games and what-not. Specifically, grinding. I am pretty much grinded out from the old days of heavy grind games.
Shiny new toy syndrome for MMOs might be able to get me to max level, that is if I find enough varied/diversionary stuff to try out/do within that grind to climb up there... but yea I have no staying power to bring up alts.
SWtoR: Grindy as heck, loved the smuggler... but... yea...
GW2: I've made it with my main, a Guardian. Any attempts to bring a 2nd character up has failed and stopped me from wanting to play.
Aion/Lineage 2: Never hit cap... even playing on non-official x+ servers.
Tera: Great concept, but the grind and probably the lag I was experiencing just before GW2 came out done it in.
As for the RPG type games... well, most of the time, the story/characters do not compel me... and/or the grind of multiple generic encounters is just too much.
FF13: hit a brick wall(some boss), never came back to it.
Kingdoms of Amalur: I want to play this... but... I can't be arsed to right now.
Mass Effect: The UI along with the grind of mooks.
I suck at Starfarer and M&B when it comes to fighting. Waiting for Starfarer to get much further ahead.
I play field commander or shooter in M&B, only moving into the fray when I'm on horseback. Indeed, I do want to play infantry... without the getting murdered really quick part.
JA2, I'd be more up to it, if I had more bodies of my own when things hit the fan...