There's lots to like about this site. First what a brilliant use of a background image to bring the page alive and also double as your logo. Second, I like minimalist designs like this (in the posts themselves) which streamline the discussion - no long postbits (where the avatar lives) and at least as a guest no signatures either. So, your threads really get down to good content without being distracted, which I think keeps true to one of the core features of XenForo. Search engines will probably like that too.
I like it. Where your logo sits inside of the 3/4 mini bowl is awesome, the focus of the picture and the aspect put your eyes right there when you first get to the page. I would suggest something for the background image but I don't know how to word it...if you send a private conversation message with a link to that background image I can edit it and send you back a visual of what I was thinking.
Funnily enough I was in the middle of sorting the backgroung out last night and had to go to bed..If you would like me to do that I would just have a couple of questions.
Did you add the white gradient to the bottom of the image?
If so can you upload the image without it?