Useless treasure chests in RPGs. Dragon Quest is the worst at this. 2/3 of the way through the game when the average piece of equipment costs at least 20,000 gold and there are chests that actually contain 50 gold. Or even better when later dungeons have leather shirts, the weakest armor in the game, in its chests. I know this is pretty specific but why do this?
GameFAQs, where most people act like know-it-alls. Until you actually expect them to know something, then they have no idea.
Randomness. Anything that involves randomness or an RNG should be extremely limited.
Instead of relying on an RNG, I'd rather they incorporated actual game play. Want a specific item drop? Kill an enemy a specific way to get the item. Or do something like Suikoden or Wild Arms 3 do, have a skill with low accuracy that guarantees a drop or steal if you hit the enemy, but certain status effects (Like Sleep) raise the accuracy to 100%, or a low attack power that guarantees a drop if it delivers a killing blow.
Incorporating game play instead of relying on a time consuming mechanic for the sake of some players that get a sense of satisfaction from mindlessly grinding would make gaming so much better.
"Cute" is a kiddy euphemism for "Sexy". Online is the worst thing to happen to gaming.