If you really feel like going for the classes and you need/want them go for it. If you don't and like your guns your using right now, stay. I 3rd prestige right now and i'd say the funnest part about it is just trying new guns/attachments that you haven't tried out very much!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.