M is the only mode for beginners to learn how Tv/Av will help them in the future. When you know what you are doing, these three are all you need.
M is great for static car show pics...
M adds no more value when you set to 0, like I did. Tv/Av work wonders if you understand camera modes. Brain farting any shot, in M, Tv, Av, will result in the same ****ty shots.
My deleted shots were due to focus. I use standard AF, and AI Servo. Either is useless if you cannot keep up with a 12" long subject moving 30-40 mph. I have a new respect for the bird shooters.
Just got a 400 5.6 today, gone take two bodies out next time, 70-200 2.8 and the 400. Same for Thunder Over Michigan.