Normal use to me Chuck is tavelling from A to B generally below 8000ft and often in +ve temps. Smooth power changes, not rattling the throttles around constantly, lowish speeds (certainly below 130kts) with maybe the occasional PFL.
It's probably easier to describe conditions that I would call abnormal in respect to most people who read this particular forum.
Paradropping/Meatbombing.
Aero's.
High altitudes.
Instructing, especially exercises 4-10(JAA syllabus) Lots of power changes and climbs and descents.
Any aircraft with radial engines.
The vast majority of private pilots in the U.K do not own their own aircraft and due to the way he syllabus is often taught, they don't tend to use the mixture control so CHT's are often relatively low, because they don't care about hom much fuel they use or often understand the whole issue of leaning the mixture correctly.
Personally I'm not sure what you mean about
power changes related to OAT
I teach my students so that they understand all the issues that relate to the care of an a/c engine from mixture control, shock cooling, proper warming before applying high RPM's, problems that can arrise if the engine is too hot at shut down, different procedures when running in an engine, use of carb heat, hot and high issues as well as making sure they have a good basic knowledge of how an engine actually works. As well as the specific issues regarding each an every engine. If I'm missing anything out, please tell me. It's always good to get some feedback from those who are more experienced.