Heres the thing, if you will always be grouped and want to add the most dps, dragon will be the way to go from 15-46.

46-50 Its a toss up between drunken and harmonious as far as dps.

I however advise you not to do dragon because as a harmonious monk you will bring a ton more to the table with all the debuffs. 

You can swap classes any time you just repeat the quest from the grand master


GOALS:
Get the celestial ward throwing weapons (lvl 30-40 quest)
Get the cragwind weapon (lvl 35ish)
Use skinning (it will get you ultra rares for armor)
Do the unicorn OR blood hound quest ( free mount at lvl 30)
IF/WHEN they put it in do the griffon quest at 46-50

Do monks get any sort of a snare?

Ty.

I went with a harmonious monk (at first, atleast) And i was wondering, do i get ONLY the abilities from a harmonious monk? or does everyone get some of each, but some are type-restircted?

Sort of new to the monk too, even tho I am 48 now. Still learning tips and tricks. Had a couple questions about the goals you posted:

1. Is the Cragwind bladestaff still worth doing at 48?
2. What faction do you need for the Celestial Ward throwing weapons quest? What's the benefit?(I haven't seen these yet, so may be a dumb question)

Thanks in advance!

1. I dont know as I only use 1handers so someone else will have to answer this.
2. The faction is in the Wardship of the Sleeping moon.  The faction is called Celestine ward.  To gain faction you must do quests (in the wardship and the encampment south one block)  and slay monsters outside the wardship, in Vol Tuniel and Thelaseen.  It takes quite a while as the monsters only give between ~ 1 - 3 faction each and you need to get nearly max faction (20k dynamic) to be able to create the legendary version of the throwing stars.  I started grinding it out at level 31 or so, doing the quests and such and after bout a full week of non stop grinding I had enough faction around level 37-38.   The quest you need is called secret weapons of leth vereal and you will not be able to get it until you have a lot of faction.  The quest NPC is outside the bank in Wardship of the sleeping moon.  

The quest secret weapons of leth vereal has you slay 5x named in VT, and 5x named in Thelaseen.  That gives you a heroic weapon.  Then to upgrade it you need all 6 components inscribed on the item to get the legendary version.  When you have all the components there is a red orb SW of Thelaseen that you use to turn in for the weapon.  It is guarded by 3 level 35  4 dot golems.  

The components you need are of the highest tier.  Ancient Ritual Candles of Kel, Sar, which both can be dropped of any mob in this area or bought on the broker. Tome of Quel, which drops in Vol Tuniel fairly deep.  Tome of Vurm which drops in Thelaseen ONLY on the two tower in behind the two main named mobs (the drake and the golem).  Then you need two runes, one of Zalge, and one of Eltha.  For the Zalge it is a rare drop off one of the two main named mobs, OR i've seen it drop only from the mini named (which roams around the zone) Lothlar the Archivist.  The Eltha rune drops in VT, on named mobs in the throne room, or dreadwing I have heard.  You can also get one from the Lair of the Vi'rak and I have heard that the drop rates are higher... Although the mobs are mostly 5 dot and higher.  

Good luck.