I think I finally figured out why I've gotten tired of Call of Duty. I played for a couple hours tonight with an old college buddy, and we were tossing around our opinions about Black Ops, Modern Warfare 2, and CoD in general. He said that he felt like the outcome of each game was out of his hands, and that statement really clicked with me.
I would consider myself to be above-average, maybe even "good," but far short of "great." This is borne out by the stats; I have a 2.07 K/D, and I'm minus 45 games in W/L (which, given the number of games I've played, is basically even, minus late joins, disconnects, and not first-place in FFA). When I do poorly at this game, it generally feels like it's because I'm being shot in the back, dealing with powerful air support, and generally being overrun due to stupid teammates. And when I do well at this game, it generally feels like it's because those idiots are now on the other team. I'm good enough to know what I'm doing, but not good enough to backpack a team, and as such I get frustrated because I can usually tell within a minute of a match starting whether or not we're going to win based on the relative skill level of the team.
Of course, there are exceptions; sometimes I go into full-on beast mode, and sometimes I can't hit the broadside of a barn, and I'll take full credit for the outcome of those games. And this has gotten a lot better with the introduction of the Merc Mosh Pit, because I can now play the objective games I love without having to deal with full parties. And I know that this is true of all online, team-based multiplayer games, not just CoD, so it's not fair to single-out and blame Black Ops for this (although, it doesn't offer nearly the same amount of carrots on sticks that MW2 did to keep you playing through the slumps).
So yeah - that's why I've stopped playing this game solo. I still really enjoy it with my old college friends and organized parties, and I'll still jump in from time to time to scratch the itch, but I think I'm done with this as my go-to solo game for a while. And since I'm going to become a father in September (eek), odds are I won't pick up the next CoD game either.
Please don't quote the troll; it really defeats the purpose of my ignore list.