Hunters: you get the first part of the pet training quest, where you are sent to farstrider retreat, but once you get there and turn in the quest you don't get the follow up to actually learn how to tame beasts.
Paladin: Judgement of light, casting this on a mob doesn't cause it to agro.
Fishing: When you cast, you have no bobber, so you can't actually catch anything because no bobber to clicky.
In the BE starter area, there is a quest to read the plaque on a statue thingy (sorry, can't think of the quest name now). Clicking on the plaque doesn't do anything so you can't complete the quest.
There's a few beasts out at crossroads that are demons. I think so far this is the only place I've seen that.
That's all for now, I'll let ya know if I run into anymore