PROFESSION COMBINATIONS
Alliance
Dwarf: Archaeology - Can dig faster and in general faster
Gnome: Engineering - Increased skill
Draenei: Jewelcrafting - Increased skill
Lightforged Draenei: Blacksmithing - Summons anvil & increased skill
Dark Iron Dwarf: Blacksmithing - Increased skill & faster crafting
Kul Tiran: All - Increased skill
Mechagnome: All - Is literally a Blacksmithing anvil, Cooking fire, and Mining forge & is literally every single profession tool
Horde
Tauren: Herbalism - Increased skill & faster gathering
Blood Elf: Enchanting - Increased skill
Goblin: Alchemy - Increased skill
Nightborne: Inscription - Increased skill
Highmountain Tauren: Mining - Increased skill & faster mining
Neutral
Pandaren: Cooking - Increased skill
Dracthyr: Gathering Professions (Herbalism, Mining, Etc. (Also Skinning and Engineering can gather from corpses) - Increases chance to spot rare stuff