It is always my opinion to put the main niche boards and categories at the top of your forum index. Put official sections like forum news/hekpdesk toward the bottom.
I love your look and feel. The colors are eye on the eyes and make you smile
The top mountain background is nice. I think you'd benefit with a nice custom logo up there, too. I just think a logo would really do well with that background.
I think your admin forum is doing well