Michael, I probably more than anyone on these forums have had bouts of the pissy whiny self-important syndrome from time to time. It's only mitigated by the fact that I know everything and I'm always right.
No, seriously though, if you're here being yourself, those kinds of things happen. People will see you have human moods and say human things. The people who come out and put up some pretend face because it's the internet are no fun because they're one-dimensional people. I'd rather talk and debate with people who get mad, upset, bitter, and sarcastic as well as who can maintain decorum and have civil discussions. The full spectrum of emotions and behaviors will always be more interesting than a select few.
I guess what I'm trying to say is, I'm sorry life sucks for you right now and don't feel bad about blowing off steam. Good people understand that, and have no trouble looking past it. If you find yourself "living there," then shame on you. Have a salt tablet and walk it off. In the mean time, let's find something to argue about, eh?