There are too many bad FPS games nowadays. The only thing they seem to be good at is their multiplayer sections but their single player campaigns suck. They have have bad level designs and lack of weapon variety.
If you want to take the time heres an excellent video by totalbiscuit pointing out how FPS have regressed: http://www.youtube.com/watch?v=0Q6UQ2QlRH0
Lets list out GOOD FPS with: -Good level design with the purpose of making you find the ammo you need -Healthpacks instead of health regen -no ADS -lots of unique weapons