Efan's not bad. And like bret said, there's no thing as a cool name. A name is a name, and it might sound stupid, funny, cool or w/e, it's the person wearing that name that paints the picture. My name isn't that great, but I have a good rep on the internet, and I kept it. I don't dislike it that much anyway. Well... I like my name but I think it got childish by now.
Efan, you're stuck with your account name once you create it. Your other option is to make a new one and apply to us to have the old one deleted, which at an early stage wouldn't matter too much... however make sure you like the new name you pick, our processes are kinda inefficient and therefore time-consuming :|