I used to be absolutely horrified of these fucking things:
They look like flying spiders, they fly unpredictably, and you never know when one is suddenly going to decide it absolutely must land on your face. They're called mosquito hawks or skeeter-eaters or daddy longlegs, depending on who you ask. They don't bite, unless they do, or maybe only some of them bite.
Actually, they are called crane flies and they don't bite at all. Some of them eat nectar, but for the most part by the time they get to a recognizable phase of life they are just looking for another crane fly to mate with before they die. Armed with this knowledge, I am no longer scared of the little flying freaks. Also, they make really excellent cat toys.
Sometimes I even open the screen door and shoo them in from the porch light just to give the cats something to do.