Playing, and having fun with it.
I like the atmosphered of this game, real modern world with all our legend true? Complot theorie, it's unusual and refreshing.
Can make my character the way I want, no limit (well, except efficiency maybe ;)), no class.
Fun quest, no boring bashing one. The first MMo who give me an headache because of he's quest, In the good sense of the therm ;), Some quest need you to think quite hard
And PVP 1 vs 1 vs 1, quite unusual for me too.
To elaborate:
animations look stupid
combat looks stupid
effects look stupid
ui looks stupid
everything looks stupid
And yet your playing mount and blade ;)
(Well mount and blade got awesome combat ^^)