Well I do work nights so actually I do these runs before work begins at 10 pm. But I know what you mean about being tired, the brain tends to turn to mush after 3 hours of banging your head against hard stuff.

Yes, if I am doing dungeons with friends, I am definitely more on the sillier side, but even in duty finder where I am more serious I will sometimes play poorly. Honestly, part of it is probably being with random people, not knowing what they will do and how they will play. But other times I have no excuse, I just play like crap and do dumb things.

And yes, doing the same dungeons over and OVER again does tend to make you lazy and do dumb things at times I will admit. It's when I am not being lazy, trying to focus, and be serious, yet do REALLY dumb things that make me wonder; wait, I AM good at this game, right?