Yes, things which burn Jet A can be fun, and I enjoy them, particularly when they have a propeller in front, and can happily operate from an 1800 foot grass runway. But, The pilot (any very much more so, if that person is instructing) must be very familiar on the type they are flying. This includes being compotent to fly the plane (perhaps with great concentration) to the limits of its capabilities, if needed.
I used to find myself asking "Really!?", when Transport Canada flight test staff told me that I would be required to demonstrate spins in the modified aircraft I was test flying. Though I have never not spun, throughout my flying years, I used to keep it a secret, as my C 150 is STOL equipped, and that takes it's spin approval away. Somehow, I managed to get into spins fairly regularly anyway - either careless flying, or an effort to remain proficient - the lines are blurred.
After spinning many GA types, the common characteristics of the spin became much more familiar to me, and were not alarming - so what if it is pointed straight down, it's not going very fast anyway! It's an unusual attitude, just recover it. So being told I would have to spin the Caravan was not a big leap for me. That said, I did prepare and research carefully, and doing it without a "G" meter would have not been adequately safe. It was facinating how the C of G position dramtically changed the recovery characteristics.
I dream of flying some military trainer type, which is actually "hard" to recover, just for the experience - but I doubt it's in my future.... Hmmm, maybe Harvard one day....