Xandus at the beginning of Mall Fight 2 was quite passionate with being a daemon prince.
In X-Ray and Vav, X-Ray, compared to his real-life counterpart, Ray, is easily this. To the point where he does stupid (and destructive) stuff.
Yang Xiao Long of RWBY not only has a fiery temper, but she actually creates fire when she's sufficiently pissed off, as seen here.
Yang's temper is occasionally Deconstructed. She's very susceptible to Trash Talk and quickly gets frustrated when a fight doesn't go her way, and it led to Neopolitan defeating her easily and almost killing her. It also allowed her to be framed for breaking Mercury's leg: although Yang is a nice enough girl and was tricked into doing it via illusion, her foul temper made the scenario very believable to the crowds watching, leading to her arrest and disgrace. A later episode deconstructs this even further, with Yang losing an arm to Adam when he baits her into attacking recklessly by stabbing Blake. At the end of it all, she has fallen into a Heroic BSOD, and only time will tell whether or not she will be able to come back from it.
Tennyo has the sort of temper that causes temperatures to rise - and Geiger counters to go Off The Scale. She has to wear a radiation meter, because she starts emitting hard radiation when she gets too angry... which isn't at all uncommon.