In my view anyone who flies a difficult plane because it is, is insane.  Why fly a plane you have no affinity for?  I fly the mossie not because it's anymore difficult, but because i love it, i have lots of fun flying it.  I die enough times, but it is damn fun.

   Doesn't stop me from hopping in a spit though.
What makes a plane difficult?  It's not easy to quantify using a single performance characteristic.  Does lesser turning ability make it more difficult?  That only poses a problem if you have not acquired enough experience to overcome it.  The majority of moves in one plane can be transfered to another.