I'll give you points on the non-aggressive one. That's not me. Not at all.
As for reasonable and even-tempered? These are functions of surroundings and my aggressive nature. Few people tend to be reasonable in unreasonable situations. There's simply no point in it. And as for even-tempered, I don't push people who don't push me - but mistaking a Polar Bear for a rug isn't the kind of mistake anyone should make.
Bottom line: if I seem unreasonable and ill-tempered, it's probably a good idea to ask why.