sometimes I actually like to hear the lens focusing... some of my lenses I have no idea if they are actually focusing or not when they are so quite and moving in short distances that you cant pick up within the viewfinder.
THIS ^^^^. YES!, a hundred times, YES! I agree wholeheartedly, I often really,really,really like to hear, and feel that little "dzzt!" sound of an AF or AF-D Nikkor being driven to a new focus acquisition. And also, in a few instances, the AF-D screw-drive focusing lenses focus FASTER than the newer AF-S models; the 50/1.8 AF-S G and the 85/1.8 AF-S G are both somewhat slow-ish focusers; earlier AF-D 50 and 85 models focus faster. I agree 100%: at times, the silent AF-S lenses are sometimes so quiet,and there's no feel or feedback, that it's sometimes difficult to sense if the lens has actually acquired a new focus. I always shoot in AF-C mode, so to me, the screw-driven focusing lenses are something I'm A-okay with. On the high-end d-skr bodies with strong AF modules, the AF and AF-D Nikkors focus quite well, possibly because the newer, d-slr cameras are a decade, or two decades, or three decades newer than the early AF film Nikon SLR cameras and their old-time AF modules, around which those lenses were originally designed.