We have Silent roll as monk for T8. It makes a big difference in how fast the Avatar goes down
Well, my only DPS class is DRG, and while I'm okay on that class, (380DPS on a training dummy,) I don't particularly enjoy playing it. Having to learn how to be a half effective DPS, in a relatively short timespan, may have soured me on the class.
Main tanking that fight isn't very fun either. You just sit there and take damage, stopping only a few times in the entire fight to either pop landmines or to trigger a tower.
T7 would be fun, if it weren't for how obnoxious Voices can get after awhile. This is especially true if you're picking up adds while a short voice timer is about to go off.
T6, I actually find to be pretty fun. Granted, it's kinda easy once you beat it once or twice, but there's plenty to do and plenty to watch out for, without it feeling like an obnoxious gotcha game.
I've only seen up to the first set of golems, but so far I'm enjoying T9 as well. Once again, there's plenty to watch out for there, but nothing that feels particularly cheap.