Hmmm, I am in two minds here. On the one hand, I can't stand miserable, negative, sour-faced, moany, mood-hoovers, but on the other hand, someone who is OTT jolly and happy and bubbly and chats non-stop, can be hard work, because sometimes I do like to be quiet and my job involves concentrating quite hard. And I agree that the 'I'm mad me!' types are a bit irksome!
Basically though, I would rather be surrounded by happy, positive people who give me a hug when they see me, and smile at me, and seem glad to see me, than someone who barely acknowledges me, or starts moaning about everything; their ailments, the weather, the government, their job, their kids, their mother-in-law, their husband, and so on!
So I would say YABU @Joker0fGotham (Just SLIGHTLY.) 