If its Aberdeen, Villers, Totalize or some other maps with a shitload of tanks, and i spawn at the tank-yard, and theres no tanks there i wait, but in a map with few tanks i never bother. Some maps, like Aberdeen, i would say you need a tank. You can run for 5 minutes and get shot, or take a rambo-kubel assault, who when i drive at least, fail 90% of the time.