Minimum Character Requirement
I find it annoying that we have a 4 character minimum for responses.
A quick simple reply such as "+1" requires the addition of 2 more characters so you can post. The extra keystrokes aren't the issue as much as getting the error message and having to go back to deal with it.
I wonder how much of a difference that requirement actually makes in the operation of this site.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan