You don't need a mouse to play shooters. I couldn't control the dam mini stick, but after only a couple of months it's becoming second nature. When you see how fast some people online can pop you in the head while doing backflips, I have no doubt that the best of COD4 Xbox would smack mouse users on PC.
Moot, Consoles can't be upgraded, and so what? I spend more freacking money to keep my PC runing the latest game with some kind of descent frame rate a year, that it cost me to buy a new console every 3-4 years ... and I don't have the fear to know if the game will even start

Anyway, stay in your old ways like my grand'ma that refuses to use a CD player.
You are right
BBBB, I'm away from home an average of 80 to 90h a week. I do have now a better understanding of the game, since I was brand new to shooters.
I really like team hardcore deathmatch the best, and have a blast there. Uzi with silencer serves me well. Sniper and Anti-sniper is very relaxing, I fancy it too. Especially since it seems to upsets people so much.
I am still new to S&D, and Domination since I don't know where the objectives are, and the best way to attack/protect them.