Prior to SB... Monk. Bard and DRK were up there, but a speedy Monk (if lagging very little) was some of the best combat I'd ever played in any MMO. Modular control, macrorotation, constant repositioning, fairly high APM, and it all just flowed so well -- though not without proper prethought.

As of SB, most of the things HW Monk does right, Samurai does better than SB Monk. Now... on the rare day when whatever's changed between the swap to west coast US servers for NA and now isn't rocketing my packet loss... probably Ninja. Or Samurai. Speed Monk is decent, but sadly underpowered relative to its duller low-Skill Speed variant, which just makes the pangs of gameplay lost sting worse.