@ac12
Yes on the QR. Sorry, that was my assumption.. I currently have a Dolica tripod, but I am planning to replace it (to big for luggage, and takes to long to setup/tear down). I will leave the plate on my camera body this weekend and see if it bugs me. If not, when I order a replacement tripod I will just get a few extra QR plates.
Tim
I found that unless the AS plate/rail has a sharp corner or edge, my hand gets used to it and it does not bother me. The only thing that does is, when/if the rail gets nicked or bumped and a sharp edge is created. Then I have to tap down or file off the protruding bit of sharp metal.
There are different length rails, so you can match them up to the equipment. I usually use a short one, about 2 inches, on the tripod foot of my teles. A longer rain can be used to fine tune attaching the tripod to the balance point of the camera+lens.
On most of my telephotos, the tripod foot can be rotated to put the foot at the 12 o-clock position, if I want the foot out of the way of my hand.
On my cameras, I prefer the L-bracket, but I will use a rail temporarily, until I get a L-bracket for that camera. I prefer brackets which are made for specific cameras, as they fit better and do not rotate. But they are more expensive. Generic brackets and rails need to be tightened down more so that they do not spin on the camera, which can be a PiA. In the old film days, the flash bracket would regularly get loose and spin

There are 2-piece L-brackets, for those that do not use the camera in the portrait position, the vertical part is not purchased.
The AS clamps are available in screw on and flip clamp models. I use the screw on clamps, because that is just what was available when I got mine, and I got used to them. But the screw knob does protrude and can get in the way. On my monopod, I have the screw knob on the right, where it is out of the way of my left hand. One advantage of the screw is that if the plates/rails are not the same size (which unfortunately some are) the screw clamp does not care, you just turn the screw to clamp onto the rail. The flip clamps are faster to use, and may have a place, but are more fussy about the exact dimension of the plate/rail.
The Bogen/Manfroto plate on the other hand would be difficult/impossible to get used to hand holding, as it is a big hexagon with the screw and nut on the bottom. In my case it is on the 4x5 view camera which I do not hand hold, so it does not matter.