Ok cool. I just got my 40d and I'm trying to shoot in the manual mode only but I wanted to know what you guys used to see if there was any image benefit to using some of the preset modes.
So now I see that manual and the aperture modes are the most commonly used. Thanks all
Shooting sports, one could use manual... or shutter or aperture priority.
Shooting weddings, one could use manual... or aperture priority.
I don't use P or Auto mode ever but I put it in P-mode when I hand the camera off to my mother, father or sister to take a picture with me in it.
The situation will dictate the mode you put it in.
There *is* no one single perfect answer for everything. It depends on your preferences, experience, camera and the current need.
As for different scene modes, I stopped using them and went 100% manual even on my point and shoot about 6 months after purchasing it. It is convenient for the people that don't understand camera functionality and photography... its a bit of a crutch, one that even I used a lot in the beginning.
There is basically no difference between using AUTO mode and any other mode unless you understand photography and the metering system. In fact, if you don't understand the basics, it will likely give you worse pictures. However, for those that know how to out-think the camera's metering system, know the basics of photography... they are the ones that are getting the superior final results. They know better than some unknown Japanese engineer who designed the camera years ago in some back room somehwere, on what settings to use and what to meter off of to get the best results out of any given situation.