Thanks Shelley_c for your very detailed critics.

1. The banner will be replaced. We may have some kind of member contest going on later where members can send in their own creations and the best one wins.
2. I already tried the variation of expanding the navbar 100%. It did look really bad. Maybe there is a way to make it look good on full size, but I am already quite satisfied with how it looks now.
3. Many people at first told me, no the text can't be like this. It looks bad etc. But once gotten used to it, its also quite useful. Because the big text stresses the more popular and more important forums. While forums that are actually just additional to the forum are being small texted. It makes it the forums most people are looking for easier to find etc. Gotten used to it, many people of my community would prefer it to be with big letters. Its more eye catchy. Though I have to admit that at first sight, I also was not sure if this is a good idea or not.
4. Yes, I will take a look here if I can find something with that I could replace the stock images. Thanks for your time responding to my review request.