the game it self usually for numerous reasons, some even kill my interest in the game it self,
never finished ff12 as i stopped caring what happened to them, which was about the time i was yelling in the street like a moron, about some other guy: short end here: story and characters
in white knight chronicles (yup, played that, sux) i knew the story was slightly less original then the sun coming up in the morning, but gave it a shot since i got to make my own character, only to find 'I' mattered less to the plot then the fucking random enemy's you kill between painfully bad voiced cut scenes. : short end here: don't waste my and money by forcing me to make a character that has no impact on the story, if its purely for the on line bit THEN ONLY BOTHER ME ABOUT IT IF I USE IT!!!!!! >.< *fumes and add it to the list of game design sins punishable by death*
game concept can, on the flip side can keep me from getting into it, i recently tried lost planet 1, and found it ok, but painfully forgettable, and uninteresting story and combat wise really, even the vital suits were kinda bland, where as transformers : war for cybertron won all kinda of points by letting clear a hall of enemy's, by turning into a fucking TANK and spamming the cannon :3
first person tends to kill it for me to, when its full time i mean, for sniper activity's its expected