I like the Siren for many reasons. The right side, Cataclysm. The final one, when you phaselock, it slags, corrodes, and shocks. It's perfect for bosses. With the slag damage. The phaselock on badasses helps a lot. I like every character, but Siren is right at the top. Loved the Class in BL1 and I do in BL2. Just my opinion. :3
Commando and siren all the way the two other classes suck ass especially zero there abilities dnt allow you to wipe out a whole group of enemies without lifting a finger
Although I do love the Siren in BL2 I really miss the abilities in BL1, they should do an addon that will allow you to use the original chars... Love the Corrosive cloud damage
Commando all the way! Those turrets when set up properly can take down fields of enemies. They also slag AND shoot rockets which allows you to shoot from the background to do extra damage. This class also seems to have the best health and shield regeneration.