In recent time, I am browsing through many forums.. one thing I noticed was, Most of the forums have similar in appearance, layout. I know almost all of the most pupular forum software has similar structure.
May suggestion is try some different themes to make the forum unique. or use a forum software which has a different look.
I am not a designer. So design a new theme is out of my scope. So I searched for a different looking forum and finally settled in bbPress (a wordpress plugin)
Once Hallow Demon grows with a lot of users, I will consider buying a paid theme which give much more improved look for bbPress forum..