I am preemptively bringing up Borderlands 2 class tags as I expect more class specific questions to be asked in the coming days and weeks as people progress further in the game and unlock higher level abilities, and the number of Borderlands 2 questions to become large enough to warrant such tags.
The first question is whether we should use the character name (Salvador, Maya) or the class name (Gunzerker, Siren) as the suffix. I think it's pretty obvious that the class name is correct choice for this.
The second question is what base to use for the tag. 25 characters is the maximum length of a tag, and borderlands-2-gunzerker fits within that limit. However, borderlands-2-mechromancer doesn't. While it isn't a problem right now, it will be down the road when this character is released. The two options I propose are to cross that bridge when we come to it and use the borderlands-2 base, or come up with a format now that will allow us to stay consistent when the Mechromancer is released.