Mine is the Engineer, as it allows me to be a very supportive character, but at the same time also gives me the ability to be very effective against infantry and vehicles as well.
Next to the basic equipment I use the Tank Mines (note: if you go to your turret slot when playing and press the B button you still have the ammo-box ;-)
For my suit-slot I use Flak Armor. Because you encounter a lot of explosions when repairing a turret or tank for example.
My weapon is the GD-7F, which has a high rate of fire. My secondary is the Rebel.
