yea after awhile it gets boring so I've been trying to prestiging...
you'll be surprised how weapons and perks make a HUGE difference. Then again, I'm finding that I actually become a better player every time I prestige because i'm forced to learn other ways of getting points. Plus, it's fun getting kills with pistols and mp5 when you have no other choice.
I just wished that they wouldn't take all your money away!!! That reallly sucks.