I've watched a few vlogs... but to be honest... oh geez.. this is gonna sound absolutely terrible..
think think think
Okay gonna go ahead and say it
The few I've seen were really more about the blogger thinking themselves so interesting that we'd sit down and watch them for a longer bit of time... Although it was nice to see how the person talks and moves.
I guess what i'm saying is.. make sure you have meaningful content if you do this.. and that the video really is there to serve the content.. not just to see yourself as the star.