Excluding all games you have seen mentioned by anyone on the internet, what is your favorite game?

Full Spectrum Warrior.

What a neat game that nobody talks about. It's in the squad level tactical shooter wheelhouse, although it isn't actually a shooter. You take an over-the-shoulder view switching between two (sometimes 3) teams in a squad, directing them through levels. It is sort of like Brothers In Arms, though in a more modern setting, small numbers of people to control, and having to fully rely on your NPCs to kill the enemies. An interesting twist on the squad management genre, it sits somewhere between a tactical management shooter, and a top down management game like Door Kickers.