My favorite thing to do is play the anti-material "engineer" heavy and sneak behind enemy lines to flank heavy vehicles with ion turret and supercharged sentry.
I have a special hatred for players who rely on the vehicles to get their score and I love ending their killing sprees.
On a typical Kashyyk GA I'll get 7 or 8 LAAT kills and a couple chicken walkers as droids or a couple tanks and a huge pile of MTT damage as clones.
Anti-material sabotage has always been one of my favorite things to do in war games. I love playing the engineer in battlefield games and rigging heavy armor with C4 or laying mines at choke points. Something so satisfying about taking out the guy who feels like he's got an unfair advantage.