Personally, the eyes are coming off like they are challenging me so I'll lump them with the aggressives. That means 64% of all ENTJ avatars are aggressive. In fact, that cartoon dude looks like a warrior so maybe it's higher. Not sure what's going on with the "bikes" avatar but I'm guessing there was a fight.
I sometimes have avatars on other forums where I basically take the piss out of a subject or person or something. But on here, I've pretty much only had Rommel, who was the greatest general ever, and Daniel Plainview from There Will Be Blood, because not only is the film in my top ten, but also because I thoroughly enjoy watching Daniel Day-Lewis do another thrilling job of portraying a mean, ugly individual. I thought the film was such a masterpiece, and I appreciated the acting so much, that I wanted to express said appreciation on here, hence the avatar.
Currently, I've got a picture of Zhukov. I was running out of people and things to admire on all my forums, but I decided that this forum hasn't had a taste of Soviet awesomeness yet (in fact, Zhukov is probably the only good thing to have come out of the Soviet Union).