I only play TDM and mostly its solo.

With that said I care about my KD since TDM is ONLY about KD.

I would much prefer everyone on my team end up 12-4 instead of people going 20-25.

For TDM someone else posted a stat of take your total kills, subtract your total deaths then divide by total number of games played and that will give you your positive number of kills per game.

Mine are:

Kills: 95,241

Deaths 37,875

Games 4705

Puts me a little over 12 positive kills for EVERY game of TDM I have ever played.

It's all about the W lzjar11!!!   If you're playing objective based game modes, it's about the objective.  If you're playing TDM or FFA, it's about the number of kills you get.  Those are the only game modes that matter in regards to K/D. 

It does nothing for your team to have someone who is a 3.0 k/d in an objective based game mode, sitting around, not grabbing tags, not going for the flag or trying to plant the bomb.  Go play TDM or FFA and then when you still have 3.0 k/d ratio you can brag all you want.  Until then STFU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I only play HCKC and I could care less if I go negative as long as I get the W.  I have a positive k/d btw, and I've really only ever played HCKC and I've never kill whored so that just shows that I am an over all good player at the game. 

+k/d and +w/l = supreme being IMO.

For objectives players there should be something similar

No of Caps - Number of defends * KD = skill level

More defends than caps = negative skill 

I play 99% domination and always play solo.  While I am prestiging the only stat that matters is my XP and I will try to get as much as possible per match.  Inevitably this means playing the objective and capturing/defending as many flags as possible.  It means running around a lot, and I don't much care about death because that doesn't have a negative impact on my overall XP.  I love matches where both teams play for the win and it ends up 200-(190-199) whether I end up being on the winning team doesn't matter (obviously it's preferable) in those matches because they are just a buzz and the most enjoyable.  Once prestiging is all done then I might change my style and start looking at KDR but to be honest by the time that happens BO2 will likely be around the corner for the next challenge and MW3 will become a distant memory.  That is the way of CoD and why I don't much worry about KDR or WLR.  As a solo objective player I have always had a positive KDR in all CoD games but yet to get positive WLR.

Not exactly true, but I see where you are coming from.

I cannot count the number of games of Dom I have played where we have capped 2, and then spent the rest of the match purely defending because we had the map totally controlled.

I have to admit, it can make for a boring game when the other team simply gives up before they even got started to allow themselves to be totally man-handled.

I think more to the point:

Number of kills - F(Defends+Caps) = Skill Level (or more accurately usefullness)

F = a factor that normalizes kills to caps, given that in a flag control based game (Dom, HQ, etc..), capping is more important than killing.

I cannot say about other games, but a similar equation could be thought up in principal.

* obviously this is only semi-serious...