Well it makes your site look like it wasn't made by designers/artists/gfx people, makes it look like it was just made by someone that wants to have a popular site to gloat. Also out of every GFX forum I've been a member of, every single one with a custom skin/theme/style does better in the long run compared to sites without.
Yeah! Not often you see a GFX forum doing much these days. I can see quite a few members online there now, so it's obviously working out for you. I like the style, colours are a good mix and it looks clean. Not much more to say really, just interesting for me to see a GFX forum actually being used, you've done well in that respect.