I visit a several forums and they use the (I assume) the same forums software. Yet this site seems to use something not so common. In my opinion it is unweildy. It doesn't feel like a site build by IT professionals.
Specifically:
- Drop down box giving quick navigation to any forum/sub-forum is very handy
- Quick reply lacks basic editing options (quoting, formattings etc)
E-mail notifications is on by default? perhaps it should not be.
And lastly, I don't care how many friends people have. This is superfluious information. Comes across as one-upmanship.
Of course, these are just my opinions.