This website...

[Eat The Rich]

...is really nice, I like the forum obviously but the design behind is really slick. I'm a web designer myself so it's good to see some decent looking sites around every now and then

 

[Jean-Coutu]

It's the best forum I ever found in english...

 

[MetroidZ]

you came at the right time. the forums used to look hideous (check user options to see how it was)