Spot metering/exposure EXAMPLES am I doing it right?

I get your point, but I find it a little bizarre to think of WB settings as "correct" or "incorrect." Certainly, if you're shooting JPEG only, you want to choose a WB setting that produces a picture that's as close to the the way you imagine the final image as possible, because there's not much latitude to adjust white balance in PP. The WB setting may or may not match the color of the dominant light source, depending on your intent. When shooting RAW, however, I usually match the WB setting to the way I perceive the scene. This helps me make a qualitative judgement of the picture when chimping. If the light source is tungsten, I might use Sunny WB so that I can check the shot against the way I "see" the scene, although I might completely change the WB in PP for artistic reasons. For me, if the color balance doesn't match the way I perceive the scene, it is difficult for me to assess the subjective impact of the photo. An extreme example of this is when using UniWB to maximize the use of the camera's dynamic range. While UniWB turns the histogram a great tool for precisely analyzing your exposure, the green color cast makes it impossible for me to judge the photo qualitatively. Your mind may be more flexible than mine, however.