As a complete amateur I use the "sunny 16" rule at 7000 ft elevation in Colorado. I frequently check this with a Pentax digital spotmeter using mostly middle tones such as folage. If I adjust "fudge" the settings it is toward overexposure with negative film and under with color slides. With color slides in 35 I just use the incamera meters in a Nikkormat EL or Nikon F2. I also use the recommended ASA/ISO and correct for the appropriate filter factors. While I will admit to no formal film testing I occasionally adjust my developement times. I find that my negatives look appropriate and print well at grade 2 or 3 for average subjects and my slides are not "blown out" but have good highlight detail.

(As I said - This is from the amateur side)