Why is SK one of those "unpopular" classes?

[rotenvok]

I want to know why is SK a not very played class like warriors, paladins, Rangers and rogues I guess (i havent seen many rogues when i type "/who" in whatever zone i have been)

Is it because people doesnt want play as tank? (IMO healer is a worse/more boring role, and all zones are INFESTED of shamans/druids)

SK can be funnier than a warrior or pally, can solo, not as good as other classes, but he can, he has pet, he is charismatic evil character, not gay as pallys, etc.

I understand why warrior or pally have low population, but not SK. About the others unpopular classes, i've no idea why they are less played.