I like PSG because it presents the enemy with a Morton's Fork. Either wear kevlar and be slowed down, or deal with 97% torso damage and an almost certain bleed-out death, neither of which is desirable. The faster reload, no need to rezoom after shooting and larger ammo supply are all nice bonuses as well.
LCDLC Mapmaking Dept.
Maps finished: Hellhouse, Sorry, Worrior 1-20
Maps modded: CubeOrigin
Maps in release candidate: Blockforts, Cannons 1, Hotzone, Icecastle
Maps in beta: Arctica, Cannons 2, Cerulean-River, Igloo, Skygarden, Spacestation
Maps in alpha: Merlin, Totem