Things I don't miss from MW2:
- Noobtoobing noobs, on either the enemy team or my team
- Usain Bolt LW/M/C knifers
- Predator Missiles
- Getting Killstreak whored
Things I do miss from MW2:
- Noobtoobing occasionally as a change of pace
- Usain Bolting occasionally as a change of pace
- Killstreak whoring
- Better graphics
- Better respawning
Looking back, the MW2 things I hated most were things I actually enjoyed doing myself.