20 Monk, 12 WD.
Monk can occasionally feel like a chore because all its attacks are derived from the 1, 2, 3 punch structure. So when you're low on spirit and need between 1/3 and 1/2 your spirit bulb to do something powerful....it can become kind of a drag repeatedly punching...and punching...and punching....especially on elite/named guys.
That said, I think Monk is one of the flashiest classes out of all of them, and you can be really responsive with stuff like the teleport punch and dashing strike, where other classes have to trundle on over to fight things. If you like being the first into a pack full of guys, Monk is the class to play.
Being good at monk I think means having good control over when you use your spirit attacks. Because all of your cool stuff runs off it, and it can be easy to 7-Sided-Strike or Exploding Palm your way into being out of spirit...which force you to do the 1,2,3 thing again. Loading up on as much spirit regen/life from spirit/life from hit seems pretty much fundamental to kicking ass with the class.
WD I haven't played as much, but I think it has some of the best conceived runes. And all its stuff just generally seems fun and thematic. I think it's probably one of the more relaxed classes to play.