I absolutely love the uf-br server, today I've had a couple of very good races, with wheel to wheel action nearly all the time!
I think this has teached/is teaching a lot of stuff that will be useful in the decent-powered GT2 class, which I'm really looking forward to.
But you're right, the server is never really full, 5 racers if we're really lucky, so I'm doing most of my points alone, which is somehow missing the point.