Yes, I agree. It is a lot more work, and most SLR cameras will do a better job of metering than most any hand held meter because you can instantly switch from spot, center weighted, or matrix metering (at least on my Nikons) to suit your lighting conditions. You will lose a lot of shots fiddling w/ the hand held meter, setting the readings on the camera, focusing, and finally pressing the shutter. If you are used to modern AF cameras it will drive you more than a little crazy. People say that shooting a meter-less camera slows you down and improves your photography. That is bull. It slows you down, period.
But I sold my M3 for all these reasons, and after using a lot of other RF cameras, and after looking thru my pictures, I am buying another one. None of the other RF cameras, including the newer Leicas, came close to having as nice a viewfinder or as contrasty a focus patch, and I have come to prefer the look of Leica glass shot w/ B&W film more than my Nikon glass. Also, w/ B&W film you don't have to be spot on w/ your metering because of the huge tonal latitude of the film. If you are shooting slides your goose will be cooked unless you pay very close attention to your scene and ideally bracket your shots. Wait till you do bracketing w/ a meter-less manual camera.
If you are out covering an event for a publication and have to get the shots, you better bring the AF SLR (or DSLR) as they do a better job. But I can't get the look I want w/o the Leica lenses, and I can't get used to the viewfinders of the other cameras, so it is a compromise I will have to make.