In my English Black, I'm using Trace (male player), and in White I'm using Violent (female player, the name is the one I most often use for female player characters, it's been in use since gen 3).
In my Jap White I'm going with Dave for the male player and in Black I'm using Solo for the female one (which again is a 'default' name I use in jap games because of the character limit).
I just noticed that I don't have any kind of default name for male characters, haha. I just pick whatever comes to mind first. I don't think I've ever used my own name in any game, much more fun to make up names :B