You need sigs for them..and make sure they're not moving pictures. And please use a better font that will match with those pictures and backround colors of those banners/avatars. Use different pictures of anime...their stance and positions were drawn very stiff. And when you make your banners and things like that, it's very important not to just add effects to it...it'll make it looks dull. But then again, if you're not going to put in any effects into it(which is fine), make a border...actually, I prefer a border ALWAYS. Without it, it looks...lost, boring, empty, and it just looks naked...I don't know how else to put it. [border thing is just a tip].
Other than that, great job on your first work.
^-^