its a normal one blue green purple and orange items suck really badly for some reason
The orange items actually provide some unique bonuses that can alter your entire playstyle, depending on what you get. I got a level 50 orange revolver that regenerated ammo on its own, and used a different class mod since I didn't have to worry about ammo.
On topic: The soldier or the berserker are the best in my opinion. I used this build: Link and went my whole second playthrough without even getting downed. The turret is pretty much invaluable - if you need to lay down the hammer, or if you need cover.
The berserker is just overpowered to an absurd level. High damage resistance, high damage output coupled with health regeneration skills mean you can pop his special and leave nothing standing when it runs out.