Re: What should I use for my website; both are good WordPress and Vanilla Forums, but
I'll prefer the WordPress version, but it's just a matter of taste and depending on how you are going to use the site in the future.
Looks like an interesting site, but it was unclear how much storage a registered user has for his private galleries and who's behind the site.
This may be very important things for people to join a site.
I think the name is rather easy to remember.
Why do you use teenbb.tk/web/ as the initial url of your site? It's probably better to get rid of the web part.
I agree with stpvoice that the purpose of the forum has to be made clear. Visitors have to find a reason in order to become a member of this site.
I suggest to center the site
Furthermore it feels a little strange to have a list of team members with every item "post available" except for one that is not available, but still invites the visitor to apply for this post.