I would definitely suggest Tinker. Armour is plentiful from questing along the way, but rarely are there quality jewelry sets. Also, cooking is for all intents and purposes self-sufficient. There are almost always ingredients on the AH, and they are VERY cheap. 7 slots of jewelry and food is more useful than 7 slots of armour and the occasional LI, in my opinion. (Signals are a non-issue. I actually have a newly L50 burglar, in addition to a L85, and I forgot they even existed.) And selling crafted jewelry has almost always been more profitable than selling crafted armour.
As far as cosmetics goes, crafted gear is not usually very good-looking. If you want a mask, there's the Burglar Rift helm (or ceremonial Rift helm).
[color=red]Work like no one is watching, dance like you don't need the money...[/color]