If bimbling or if site seeing is part of the journey (the norm), then I usually fly at 2,200. 2 reasons: 1 - I avoid the norm & 2 - 2k2 is an easy altitude to read as both hands in the dial are together.
If long distance then I go up to about 5,000. You start getting the benifits that Miserlou mentions and can often be over any enroute CAS. The altitude required for the most direct routing is often chosen.
And if you don't believe Scooter boy's warning about VOR's, go up to about 7,000 near (not too near) a VOR on a busy day & look down. It won't be too long before you have to take your shoes & socks off to count the aircraft.