Isilion, Laser is totally off-subject here. Just the fact that you're posting in a normal manner means you are not a n00b. You're a newbie.
N00bs don't change. They're always right. They don't ask questions: they tell you what they think. And goddammit, it's RIGHT.
Newbs are new players who can reason logically, and ask questions to learn a variety of opinions before making educated choices.
You are no n00b. Now, onto the question.
Dragonscale would be good for you, as a Hunter, because at level 40, you wear mail, and dragonscale is primarily a mail-making route. There are problems with dragonscale, though; the first one being the expense. Everyone will agree, dragonscale LWing is expensive. The scales can be tough to get (a lot of them require UBRS runs at the end-game), and the patterns are insanely high. Then again, the pieces are good.
The second problem is that, post-40, your girlfriend will continue with leather, and you'll get mail. Since Dragon-scale is mostly mail, you won't be able to make as many items (or as many good items) for her as for yourself. Not calling you selfish, it's just something to keep in mind.
I suggest checking the Trade Skill Sticky's Leatherworking section. Under it there is a link to "Dragonscale, Tribal, and Elemental Leatherworking: Let's Talk." It gives a lot of the recipes unique to each branch, and tells you the pros and cons and basic stats found in each branch.
If I remember correctly, it basically goes:
Dragonscale: Shaman and Hunter (mail)
Tribal: Rogue, feral Druid
Elemental: casting Druid, casting Shaman (leather)
That might be a little off, but I seem to remember that "basic" outline. Keep in mind that there is overlap, of course. Check the guide and decide for yourself! And keep asking questions ^_^