I learned to fly too many years ago, in our family Champ. Since then I have been a civilian flight instructor- and have taught aerobatics in everything from C150 Aerobats to Extras to Stearman biplanes- a military flight instructor (faip)in T-37's and T-38's, and an F-15C instructor, and, during my 22 year airline career I owned a warbird/aerobatic school, where we taught everything from basic loops and rolls to competition-oriented acro, as well as ACM/BFM in the T-6's equipped with laser designators.
I my experience, new acro pilots tend to be more afraid of being sick than they are of dying in a fiery crash! I think pilots are pilots, no matter where you are- the worst thing that can happen to a fighter pilot is to die while looking uncool- this seems to apply to most civilian pilots as well.
I will throw in one caveat- I have had students exhibit real misgivings before their first acro flight in a Stearman, due to the open cockpit configuration. Oddly, though, once they had a flight or two under their belt, they all preferred the Stearman- not for its snappy flight controls, because they are anything but, but for the visceral experience, you feel very much a PART of the maneuvers when you can feel every bit of disturbed wake and smell your own exhaust when you fly- or fall- back through it.