This is all terribly familiar...
I often spend time just loitering in the shop. Usually it's because I'm trying to remember where I put something. Sometimes it's deciding where to put something, and sometimes it's resolving to tidy up a bit. Often, after resolving to tidy up, I am overcome with ennui and have to sit down for a while.
The smell, ah, the smell. I guess I'm lucky as I can, relatively easily, fill my workshop with the smell of WD40, burnt cutting oil, or a choice of petrol or diesel exhaust fumes (depends which compressor I want to run). Any of those are acceptable, although the diesel is pushing it a bit I must admit.
I also frequently talk to myself when machining. The repertoire is a bit small & usually consists of "where the bloody hell has that gone" and "osh*tosh*tosh*t" and "bollix", but just occasionally you might hear "yes!".