Most FPS games use 90 deg FOV because it is roughly equivalent of human FOV which is 60 deg but has additional less focused area of vision even to the 180 deg... as comp gfx can't emulate this "less on focus", 90 deg is the usual compromise.
Having bigger FOV also means that there's more stuff that has to be drawn, so it also affects you framerates. But by all means, use whatever FOV you think is suitable for your game!
Having bigger FOV also means that there's more stuff that has to be drawn, so it also affects you framerates. But by all means, use whatever FOV you think is suitable for your game!