We did a bit of personality research awhile back on scuba divers and cave divers. DA Aquamaster summarized our findings nicely. Cave divers tend to be somewhat lower in thrill-seeking than scuba divers (both well above the general population). The interesting difference was that cave divers tend to have higher self-esteem and a very high degree of impulse-control. They also tend to be inventive, creative. It's unusual to find abnormally high impulse control AND abnormally high thrill-seeking tendencies in the same person. This, I think, is the controlled-risk, or risk management idea expressed by DA Aquamaster (and FW).
I suspect there are scuba divers who get into cave diving for the thrill-seeking aspect, but who are also a bit implusive and these probably don't last long - they may even be the primary group of students and newbies who race through the cave, ignore cave-etiquitte, violate conservation, etc. They may constitute the five-year or less group.
On a personal note, but one I think many of us can relate to, I too am like DA Aquamaster - His post was like something I could have posted! I'm the one at work developing new ways of doing things, pushing the envelope, getting called to the principle's office (things don't always go as planned out there on the edge!), and although most everyone around me thinks I am a risk-taking thrill-seeking adrenaline junkie, I am way more into reducing risk, going cautiously into new situations, planning things down to the smallest detail, and having back-ups for back-ups!
-skip



Semper Fi, Cameron David Smith, my son, my hero. 11/9/1989 - 11/13/2010 


Bookmarks