One thing that I'm after is a sharp crisp picture. Looking at the one below the top pedal or rather the outside edges are fuzzy. Now I did do a center weighted metering which may be the cause of this and I was using my 18-140 lens where my Micro 40mm may have been a better choice (probably a better lens too)?
Several things contribute to good, overall sharpness. One of the biggest considerations is the lens itself. Really good glass gets you really good color, contrast and exceptional sharpness. Primes lenses, typically, are sharper than zoom lenses but that's not to say you can't get excellent sharpness out of a zoom lens. Looking at your shots I see the shutter speed was 1/80s; that's a tad on the slow side, in my opinion, for a handheld shot but fine here considering you were using a tripod. Rule of thumb for handheld shots with a DX camera like yours, and opinions vary on this, is 1.5 to 2 times the focal length. I really try to lean more towards two times the focal length. Another tip: Use Quiet shutter-mode.
As far as lighting goes I'll be using natural light in all of my shots outdoors unless the flash is needed, at least for now anyway.
The quality of light you are shooting in will have a certain effect on sharpness... Soft, diffuse light tends to soften edges.
Personally I would like to get a great shot without making in-camera post adjustments, surely that's possible or are we saying that most of the super shots I see on here have been "adjusted"? If so then that's something else I need to learn about.
It can be done but really, at least in my opinion, post-processing goes hand-in-hand with digital photography and yes; I would hazard to guess that most of the outstanding shots you see here on Nikonites are awesome due in part (either large or small) to knowing how to post-process. If you're going to take full advantage of your camera's ability, you're going to want to shoot in RAW, and shooting in RAW pretty much demands you post-process the image.