As a peace offering to its baying fans, Gearbox have released interactive skill trees for each of the Borderlands 2 characters. The trees let you pick out the skills and make a provisional character build, letting you see what level you'll need to achieve to get it.
The trees are a neat little treat to play with, speaking to the part of an RPG-gamers heart, the part that beats especially fast when you level up and have to make a decision far harder than any moral choice yet implemented in a game: where do I put my skill points?
Go have a play. It is, after all, not that long till its release on the 18th September.