I can’t get over the fact that it is the bear that is the topic of concern; you really need to lose the animated gif avatar, I think!

The bear is as annoying as many footer images on ENworld, but I think it is unfair for people to tell you that yours is unusually so. It may be slightly bigger than average, but it is hardly one of the uglier ones...
In general, I would prefer that people dumped not only their images, but their, ah, humorous signatures. Even if it is funny, after seeing it once or twice, odds are it isn’t so much. All of that stuff just drags out the length of threads, making it harder to read, and hence communicate with the other posters, the point of the exercise.
Yes, you can turn things off, but I expect that many people come in and browse around without logging in, until they have something to say, and you have to see everything while you do that. The same goes for people who visit and may be considering joining; sometimes the threads are a brutal eyesore, which may drive people away.
I like that people put links to their game-related websites at the bottom of posts, when they keep them short. That seems helpful and communal. The jokes and images just seem like filler that take up too much space.