[Bunny]

What exactly is so wrong with Alliance? Aside from it not being Blizzard's choice of races?

Tailoring provides some of the best caster gear until t5/t6 gear. Frozen Shadoweave is excellent for warlocks and shadow priests until t5 becomes available and even then it is still only a sidegrade. It is the same for Mooncloth for priests and Spellfire for fire specced Mages.

As a rogue, depending on whether or not you are raiding, you'd probably want to go for Herbalism/Alchemy simply because of haste pots and the like. If you plan on raiding then you would probably want to consider leatherworking since they provide some of the dps gear available at the moment.