I thought about this myself the other day but quickly decided that it wouldn't be worth it. I think that if you have a unique name and a banner and avatar that stand out, then that's all you need to attract people. Plus, there's nothing more annoying than one of those overly loud, cheap-looking intros that go on way too long. The times I've clicked on a video and seen that are times I immediately click off because I lose all belief that what I'm about to watch will be anything credible. I'm not saying your intro will be like that if you did make one, but given that a lot of the most well-known Youtubers don't use them, and with the risk of it being annoying if it's too "this" or "that"... I simply wouldn't bother.