First of all you have to have beat in you in order to play them, yes I do realize that I sound like one of those crazy music people out there but it's true. If you're one of the people who doesn't listen to real music and only listens to rap then your probably not going to be able to play the games seeing as rap doesn't really have any music in it at all just some crazy white guy trying to sounds black.
Really I don't like FPSs as much as I like guitar Hero, Rock Band, DDR and Stepmania. FPSs are fun yeah, and I'm DEF really good at them, but they are really just mindless shooting games.
FPSs don't require that much skill so really you aren't gaining ANYTHING from them when you play them, but when you play things like Guitar Hero or DDR you gain skill, and even get exercise.
What your post told me is this, you don't have the patience to get better at anything, you like to sit in your chair all day and not do anything, and that you make random posts about not liking one game because it takes to much practice.
Also if you think about it FPSs are repetitve, "ZOMG SHOOT THAT GUY, NOW THAT GUY! FOLLOW THAT PATH! SHOOT THAT GUY! FOLLOW THAT PATH!"
And the reason why they are good at these games is because I've found all asians have a pretty good beat, and none of them that i know of at least listen to rap. Plus they put time and patience into them, things that your apparently don't understand.