i think BO2's scorestreak system is way better than MW3's pointstreak system. BO2 gives you more or less points depending on what it's for. I like how capping an enemy flag is worth more than capping a neutral one, or how a kill with your gun gives you more points than a kill with a sentry gun.
I agree...I haven't had much time to play lately, but have played on the xbox alot. I would really like to see the game change where helping your team (like rescuer (saving an teammate in trouble), shooting down uav's, destroying enemy equipment, etc...) get you ranked up/more points than any kind of kill streak. I would love to see cooperative play and teamwork and those that help the team, should be rewarded more than any kill whoring. By ALOT!
I hate them because I suck right now and don't get to use them! lol Haven't had much time to play yet.