Yeah, this is basically me. However, I don't wear tapout and don't have abs. I think it's like you said: being a beginner. Hell, I hit a new PR every workout, and it's probably the biggest driving force behind my sudden onslaught of overconfidence.
I may think I'm strong, but there's always somebody stronger, bigger and faster than I am. That's what kind of brings me back down to earth; knowing that there's somebody better. I aim to be the best at what I do (and as of yet, I don't really know what that is or what it will be).
I'm the only one in my group of friends that seriously lifts, so that's possibly another reason why I am the way I am.
If it helps in anyway, here's my stats.
So, am I an overconfident douche? It seems as though I am.