agreed, mine are not mean at all. I have 7 in my 29 gallon community and they are great. HOWEVER:
I went to a LFS and they had like 20 of them in a 20 gallon tank and they were nipping at each other like crazy. Maybe it was that particular stock or maybe it was just because they did not get enough swimming room. I've put my school together from different stores and never had one problem.
I've seen a few be aggressive towards other fish. Then again, I've seen the same behavior in mollies and platies. I guess some just don't get along with everyone.
Responding to you own alter ego posts? Dude, that's SUCH a sign that you need therapy. Really. Hearing voices in one thing--answering them is a problem.