So far, I have a 100% accept rate. I think I might be slightly overreacting to some peoples' 40% or 50% rates. I want to know if it's considered impolite (note the first comment) to accept an answer too quickly. Also, is it ever appropriate just to never accept an answer? When should I do that?
I don't think I can add much to the standard stackexchange answer except to emphasize that quickly accepting the first correct answer can lower the odds of someone writing a more thorough, thoughtful answer later. In most cases I think waiting two days gives folks plenty of time to write that longer answer if they are going to.