Sort of
Like the talent trees in WoW and Diablo, but MUCH more simplier, more like a tweaks to your character
Something you choose to be different and not like everybody else
And assasin with polearm... I've seen it and I still hope that it is bug...
ps: now that persepha said, the sieging will really become boring very fast..I would use annoying. Damn I haven't seen that point by now