How to decide on a cosplay?

How do you decide on a cosplay to make? There are so many choices. You have a bunch of favorites. What is a good way to decide? What I do is try and find a character that I like, how detailed is the costume and is it a recognizable character? Can someone walk up to you while you are in costume and be ecstatic that you decided to dress as their favorite character? Kids are always fun to see them smile and their face lights up when they see you. However, this is not limited to just kids. All ages generally still enjoy seeing someone dressed as their favorite character.