AHAHAHAHAHAHAHAHAHAHA! No, you're fine. If you have any problem (even remotely), it's just lack of assertiveness when you actually have to close threads. But then, it's probably for the best that you're not overly assertive because assertiveness often comes across as just being mean.
I, on the other hand, kind of feel like I suffer from a case of "open mouth, insert foot." Basically, I sometimes think I make a singificant post with a blatant point, and then later end up seeing someone post a response that seems to demean my comment. I then feel like I shouldn't have said anything at all since it makes less sense to me that I said what I did after I see someone contradict me. >.>