I used to have my dev setup on 2003-R2 server (mainly to have full IIS) and while it worked well for that, there were a lot of drawbacks with missing desktop features.
One of the most annoying shortcomings was the lack of Bluetooth support, which meant that my Microsoft Desktop didn't work with it, and I really missed that.
When the hardware failed recently, I installed Vista on the replacement, and have found no need for Server as my dev machine any more... and I have my BT desktop back.