It's a great game to try different tactics and for thinking up off-the-cuff reactions to rapidly developing attacks. I play just about exclusively as Arty, and get a kick out of the whining and hate in chat when I can land a few nice shots. I do keep a "Loltracktor" with a nice radio around to play zipping about the map to annoy the heavies.
I think I've been killed a few times by Nasty, most of my accolades are as a confederate, managing to track and slow down attackers so my team can pick them off.
Great fun, and I agree many of the premium accounts seem to miss-spend the gold.