I like all of them, but specially Ghost Recon Series, Medal of Honor Series, and Halo 1.
Even though this game is not only first person, i still like it, Metal Gear Solid Series for PS2
halo =yes
doom=NOooooooooooooooooooooooooooooo!
and battle F = yes
and the otheres i like so so
*thinking out loud*
"but halo 2 is the one i like best but i like halo better then halo 2 so i'm really think halo or halo 2 hmm halo on one the list so halo 2 it is"*