Whenever I type a response to a post, I read it over a couple of times for spelling and grammar errors and hit submit. I don't know why, but it never fails that I miss a few spelling and/or grammar errors when I look it over again after it's been posted and have to edit it to clean it up.
Do you have any odd habits or quirks when you're posting here (or online in general) that make you chuckle at yourself?