What warband is the most 'fun' to play? Since fun is a subjective thing please give your opinions on why you think this.
My thoughts is that Orcs and Goblins are. My reasons are that they are random enough that plans go horribly wrong for SOMEONE at least once a battle, and they are resilient (and cheap) enough that you can try out all sorts of fun things and really not ever have to worry about getting bogged down into a purely strategic power-gaming.
Plus yelling WAAAGH! is always fun. Especially when followed by diving charges!