For pvpers, id go with skinning and engineering. Skinning for its passive effect increasing critical strike rating and engineering for their crazy stuff. Enchanting u can buy, most engineering stuff required u to have engineering skill to wear/use em. The reason why id go engineering over enchanting.

However, if its gold u talking about, id say go for skinning/mining/herbalism. Selling profession mats is one the popular way to make huge amount of gold.

got a problem buddy?