Should I use a webcam in my videos?

I just started a YouTube gaming channel called Dr. Phantom. I started with a Minecraft Let's Play and I only have 3 episodes, I'll upload the fourth tomorrow. When I have like 10 or 15 episodes I'll start a Left 4 Dead 2 Let's Play. Should I add a webcam video perspective in one of the top corners, or should I wait a little longer to do that in my videos, or should I NOT do it at all?

This is my channel if you want to check it out:
http://www.youtube.com/...rPhantom99

I'll try to upload videos daily.

President

You should use it for series the can make you have interesting facial expressions.
Left 4 Dead 2 would be a good one but i think you should only use a face cam for minecraft when you play mini games

Charles