Aside from beating certain game mechanics, there are WAY too many DPS which sit on their limit break and only use it as a finishing move. What's especially funny is that if many of them actually used it sooner in the fights they could potentially build up a second LB as well.

Chances are that if someone has to tell you to use your LB then you're probably sitting on it like an idiot and only intend to use it when the boss is practically dead anyway.