Agreed.
For some background knowledge, the whole changeable FOV concept (like so many other cvars) was introduced by Quake, which was designed with a 4:3 aspect ratio in mind and a default FOV of 90.
However, quite a few subsequent games use lower FOV, around 75-90 is typical.
For guidance, FOV 90 at 4:3 is the equivalent of 90*(16/10)/(4/3) at 16:10, or 108.
Personally I change my FOV depending on the game.