When I started tanking, I chose GNB first as my favorite.
WAR has its unique charm and lots of fell cleave. Inner release and most of the skills having this shrug off animation felt pretty wild and beastly to me and was my close second.

Post lv 70, DRK is my top choice, followed by WAR/PLD. ShB has especially cemented DRK as my number one tank. At first I didn't like the slow wind-up attack animations, but it grown on me and I can appreciate how it felt in ShB.