Airline/Corporate experience don't count for nutt'n when flying piston GA.  I
don't have a co-pilot, FMS, radar, TCAS, GPWS, dispatcher, Stewardess,
weather staff, etc.  No one brought me coffee or flew a leg in relief.  No
tug ever backed my plane out of the "gate", I frequently do my own fueling,
get my own O2 bottle filled and actually update the Jepps myself.

My 1800 hrs are mostly below 12000 feet (thats in the weather, not above it),
with 1250 of those hours x-country (Like thats what the plane is for Dude).  
But, what the heck, I'm like the energizer Bunny - I just keep going.

Grayhawk