I know that WoW is out for seven years. I don't expect GW2 to have that many different kinds of stuff to collect. It's enough to know that they have stuff like mini pets to collect and I'm sure they'll include more in expensions.
I'll probably will play an Engineer. Does anyone know how expensive it would be to skill more than two crafting professions at the same time? Is the fee to switch professions high? Or is it most likely that one has to level the first two professions first and then after hitting lvl 80 farm gold to afford switching back and forth between the professions?
If it's too expensive to level more than 2 professions while leveling to 80, I'm torn between these two professions as my first two:
Cook: just because the cooking system is awesome and the food buffs look great
Huntsman: Nice to craft pistols and rifles as an Engineer while leveling to 80
Leatherworker: Same as Huntsman but with armor
Juweler: Probably one of the best professions besides cooking to earn gold with
The cost is 10 copper/lvl to switch into a profession, you don't pay to switch out of one. Relatively speaking it can be expensive at 400 it'll be 40 silver, but in all honesty at lvl 80 with more than one crafting profession that's not going to be that big an issue, sure you won't be switching between them often but it's doable. By lvl 30 in BWE2 I had collected a couple of gold, and I wasn't hording it either.
Since you're really into crafting I say go with cooking for your first. For the second depends what you want most out of it, the gear you can get in game you don't *have* to craft it, but it does add customization and different styles. If you're looking for more gold I think jewler might be better for it, since all professions can use it, imo.