I just sharpen my sister's kitchen knifes and I like to use my paper wheel which gives them all a hair wittling mirror edge. I find that I get better cuts, espeically out of soft fruit with a rhine, with the sharpest edge possible. the only time it doesnt cut well is if i dont get to the edge (which i did in my earlier days of sharpening) which confused the hell out of me since there was a nice mirror edge but it just wouldnt bite into anything. I do notice that if i use these edges to cut thru bone (especially thick bone) it will sorta bend the edges but a quick run thru the slotted wheel trues up the edges quickly and even with an unperfect edge, it will still cut fine.
as for my bread knifes, i just use a serrated edge knife and it seems to work fine. most of my bread is precut from the deli.