Most people will tell you not to worry about those small details, because they won't matter or be seen in most renders.  They add to polycount, blah blah.  Personally, I am of the mind that we live in the age of powerful CPU, and even more powerful GPU machines, and most people (not all, mind you) can handle much higher poly counts than just a few years ago.  So geometry isn't as big a deal as it once was.  Heck, even game engines today can handle as much polys in real time as a Poser scene was seeing less than 10 years ago.  It's the size of textures that usually slows down the real time stuff now.

Anyway, I like scenes that have detail.  I like to know that if I want to do a closeup of a screw, the screw is in the scene.  Haha.  I'm being dramatic slightly, but I think a little more attention to detail goes a long way in quality.  Too many modellers in the Poser world leave out details, and the scenes end up looking flat, and unrealistic in the renders.  You'd be surprised how accurate scale, and realistic detail can affect a render, especially when using physical based render engines like iRay, Luxrender, or Octane.  Just don't overdo the geometric resolution of the details.  Keep small objects as low poly as you can, but at least add them in.  There's no telling how someone may wish to use the item, and what camera shots might be in someones mind.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.