When I joined Flyertalk in 2001 my travel was about 75% business and 25% pleasure. From 1997-2001 I did about 125K BIS miles a year, almost all on United.
I've taken a new job since then and my travel as greatly diminished. The ratio has switched, I'm now 20% business and 80% pleasure. About 40K BIS miles a year, with no real loyalty to any one airline anymore (at least not enough loyalty to get status
).
I do have AA gold from Citibank