Please & Thank You are nice.
I'm with Frances on this one - genealogy keeps me off the streets and out of the bingo halls.

My biggest peeve is lack of information in the initial requests. It is frustrating to spend maybe a few hours tracking something down only to be told later "Oh yeah, I had all that".

2nd peeve - run-on postings. Occasional use of the "return/enter" key can make a posting much easier to read.