"Mxsmanic" wrote in message

Is maintaining a specific altitude important under VFR, or is it okay
to drift over a broad range? I admit that I don't necessarily see a
compelling reason to fly at 6000 rather than 4000 (or vice versa) in
most cases, or anywhere in between.

Cruising altitudes are assigned or recommended, appropriate to
circumstances. The pilot must be able to put, and keep, his aircraft where
it is supposed to be, within specifically defined parameters. If your
desired cruising altitude is 5500 feet, you should not be fluctuating
between 5200 and 5800. With some experience and proper attention to your
craft, you ought to be able to keep it within 25 feet or so. FAA minimum
standards are somewhat broader.