*starting from the OP and pulling through to the end*
Yeah, DWO was...it was worth trying, but I couldn't force myself to like it. Lag made multiplayer combat unbearable and the single-player content was so threadbare as to be incomparable to any of the existing DW games. I love the idea of a massive DW game, but the execution just didn't work.
I played Shu for one reason: they had control of the southwest, and I wanted to play a jungle recruit. Location, location, location! (That and, given you could only borrow a few officers' basic movesets, I knew Zhao Yun was a good choice since that spear is great as a basic crowd-control pattern. Switched to the whip-chain later to try it out and good lord did it suck by comparison.) I'd probably look for a similar "barbarian" role if an open casting call for a DW RP started up here on Elliquiy, though to be honest I can't say I see how well that setting for RP would work out. Large-scale warfare-centric RP? Hm. Maybe, but I dunno. Those seem to kinda break apart into individual conflicts with timing issues more often than not.
Sidenote on the Shu rocks/Shu sucks debate: from what I recall in my various classes including RotTK in the curriculum, it seems that Shu was lifted up in the story as the honorable/virtuous side but in reality was seen as more of a usurper faction reaching for the throne when they didn't deserve it. Point of view's everything, eh? Personally I don't care for the politics either way. I work with the warriors who get the job done; let the higher-ups worry about the long-term consequences. (Translation: full spectrum of favored warriors - Zhao Yun, Zhou Tai, Gan Ning, Xiahou Dun... I don't play faction favorites. ;p 'Sides, custom warriors are where it's at!)
Bleh. I think I may eventually have to get a PS3 to try out the Troy version, but then again, I dunno. After this many games into the series it does feel like they've run out of effective additions to the formula. Why spend more on essentially the same game?