I'm with Bees on this one. MW2 was the best CoD ever and Ghosts is right behind it.
-The scorestreak mechanic was great, but all it did was reward players who already played the objective. Black Ops 2 didn't have more or less killwhores or objective players than any other CoD, and neither does Ghosts. People play like they've always played. (Side note: in my experience Battlefield players aren't much better than trying to win than CoD players)
-Maps are much better and more varied than BO2.
-Connections are obviously much better.
-Create a class is improved. I didn't care for the Pick 10 system, but Ghosts nails it with the wealth of perks available. I can build my guy however I want without being penalized for attachments or more perks from the same tier.
-Create a soldier is a big improvement on the prestige system. You get to start from scratch and try new things without losing everything you worked so hard for. Plus you get lots of classes.
-Hardpoint sucked 6v6 and HQ was my least favorite mode, so it's fine by me that they're gone. Also I was on the fence whether 2 round Dom was an improvement so I don't care that they switched it back.