LOL=Monotonous
Title says it; League of Legends is too painfully monotonous. It's just 5v5s in fixed positions, slugging it out until someone snowballs (preferably the bot lane) with no chance of recovery on the same stinking map, fighting the same drags and monsters who provide minimal boon to destroy the nexus, either by forcing a surrender or just destroying it. If it is not that, it's ARAM, where you always face some cancer comp while two of your teammates are either ham or ham-headed. The only excitement feasible is when some cheez-it is attempting some "troll" build on a random champion and throwing harder than a Scotsman in the caber toss, or autofill screwing over some team just for better queue times.
Frankly, I'm forgetting why I bother to keep playing this game instead of something more reliable or variable...like Blizzard's games.