I pre-ordered the game, but now I'm starting to regret it... I'm gonna want some positive reviews from people I know about how the game is. The "official" reviews are obviously going to be in the high 80s or 90s just because the game is like a blockbuster film directed by Steven Spielberg. Dunno, maybe I'm assuming too much and this installment is really an improvement over the first Modern Warfare, but I really hated some of MW's mechanics, and I'm skeptical about whether or not MW2 will fix them.
That and currently, my main interest in MW2 is the fact that it will be the only game everyone on my Xbox Live friends list will be playing until L4D2 comes out.
Peer Pressure* is NOT a valid reason to buy the game.
*(in a loose sense of the expression)