StingingVelvet: I'm not talking weird FOV extremes though. I know some people use those for multiplayer, but that doesn't mean a basic and normal FOV range from say 70-120 isn't a very important thing for a singleplayer game. There have been some games with FOVs I couldn't even play them in singleplayer, like Turok.
timppu: Yeah I guess it is a bit hard for me to tell what would be the "correct" FOV for a certain FPS game, hence I just go with the default as I assume that is what the game is intended to be played. With the only online FPS game I play I touch FOV only so that I can see more, and because others are doing it too. Albeit, I did play TF2 quite a long time with the default FOV too and touched it only like a year ago.
I agree Turok felt oddly "cramped" where it felt like you were looking through a looking glass or something, but I guess enemies mostly appeared before the player IIRC, and gave lots of warning signs (sounds).
Games like TF2 grant higher FOV for widescreen ratios which give them a fake advantage.