Rogue the least played class at lvl 80: why?

My rogue alt is only level 29 so I don't have any experience of playing a rogue at high level. What I want to know is why there are so few people playing them now at level 80? They do good damage, they have three distinct talent trees and so far I'm finding they are fun to play even with my low level green weapons :p

So can someone explain why the shortage of level 80 rogues? As far as I can make out they're a fun class and can't really understand why the rogue population dropped so much.