Borderlands 2's fifth class, Gaige the Mechromancer, was slated to arrive next Tuesday but oh! She'll be available today. If you pre-ordered the FPS-RPG, or plan to cough up $10, you should be playing as her by the end of the day, but you can get a head start by planning your build on her newly-released skill tree.
Gaige's three trees cover a fair spread of play styles and ability levels. For newbies, the Best Friends Forever tree has lots of skills to generally help you out, not to mention a load of references to My Little Pony: Friendship Is Magic.
The second tree, Little Big Trouble, is a relatively straightforward affair buffing Gaige's elemental damage and her robot chum, but the third is an intriguing one. Ordered Chaos revolves around stacking 'Anarchy' bonuses by killing men and emptying magazines, which boosts your damage but messes with your accuracy. Anarchy can also explode men in mid-air, and buff up melee.
So then, which tree most tickles your fancy?