Generaly speaking you wouldn't use a server os on a home machine. One they are expensive(server std is like 700 bucks). Another reason is compatabilty. Generaly speaking they are not as compatable with drivers and programs as some programs run an os check before installing.
On a side not server is generaly a little faster then the windows it is based off of. IE 2003 is a little faster then xp. This is due most of the time to it just having less running in the background by default.