I am picking my prof for druid and thinking about the long term bonus. for those that dont have these memorized i got this from the zomgawsome mage post ever guide.
Alchemy - Mixology (4hr Flasks and +37 SP using Frostwyrm)
Blacksmithing - Extra Gem Slot on your Bracers and Gloves (Belt is usable by everyone). +38 SP with Rare Gems
Engineering - Glove Enchant that gives a haste buff when used
Enchanting - Ring Enchants (+19x2 SP)
Inscription - Unique shoulder enchants = +36 SP
Jewelcrafting - 3x Dragon's eye gems (Prismatic). = +59 SP and -24 stamina (or -16 spirit) compared to using rare gems
Leatherworking - Bracer Encants = +37 SP
Tailoring - Unique back enchant (Lightweave Embroidery) = +/~2dps
Im thinking skinning and leatherworking would be good because i can make my gear, and get the + crit and bracer enchants. However, because i have never seen end game in wow, i have no idea if this is best. Any ideas?