Genetically predisposed to rant?

Tons of grading due. Gross, I hate grades more than ever now - if you can believe it, it's much worse on this side of the desk. I'm sitting there, looking at all these columns of numbers (and FYI, I hate numbers, major reason why I left the science field) and somehow, through some calculatory (no, I don't think that's a real word) magic, I have to make them make sense to not only myself, but also to my students, their parents and the faculty. Ugh. Ugh. And ugh again. Oh dear, here I am, complaining again. Do you think being cranky is genetic? I think it might be partly, only I didn't get it from my parents. My folks are two of the most upbeat human beings you could ever meet. They see the silver lining in every cloud, the good in everyone. It's enough to make me sick sometimes, hahaha. At any rate, I think I got it from my great-aunt, much as that pains me to say. She's one of the moodiest women on Earth, but thank God, I think I have one up on her coz I'm pretty rational, if I set my mind to it. Even when I'm on a tirade, I can still see reason - whether or not I choose to acknowledge it is another story, however.

Final thought: Some traits skip a generation, I guess.