I disagree. Yes, you may adopt a remarkably similar attitude and similar mannerisms with your character as in real life but it is still a character. Odds are you will act differently in some way. I, for example, am far less aggressive and, sometimes, matter of fact with what I think in RL. I also curse a lot more. However, that is neither befitting of a ruler (well...ok, of my personal view of a ruler) nor a welcome addition of a game. When I get emotional about something in RL I am far less likely to show it than I will here, simply because the emotions of my character are simply that, they are not truly me and it's not a real event happening (you know what I mean here, don't get all antsy about it).
Yeah, in RL I still screw around a lot, I still don't take a lot of things seriously and most times I'd just as soon have fun as win and that does cross over to here. However, that's not me not making a character, just me taking aspects of myself that I like and applying them to my character. I know plenty of people who OOC are noticeably different than in game, even if the difference is only slight.