I think we all tend to favor certain kinds of names. I like "A" names... I have Alexa, Ashalynn, Angela, Annie, Addie... and each of the three main novel ideas I have involve an A-named character... Abigail, Anneliese, Adrienne, plus a short story that would involve another girl named Annie (named for a song, though, so not necessarily my choice.) A lot of my other female character names start with vowels. My other big one would be C/K names... Claire, Caitlin, Katelyn, Kaelyn (LOL almost the same name). It's weird, but most of the major female characters I've named myself (and not for anyone else or for a song or whatever) have those kinds of names.