Personally I considered that the Jetstream T Mk 1 had the worst control harmony of anything I'd ever flown. It seemed heavy but sensitive in pitch, light and unresponsive in roll. Another problem was that the airflow from relatively large diameter propellers over a small, high aspect wing would cause any asymmetric prop blade angles to generate roll.
Thus on landing you would work hard in gusty conditions to keep the things wings level, whilst making small pitch inputs. Then, if you brought the power levers back to idle just before the flare, it would lurch out of the sky as all the lift fairies buggered off, leading to an imprecise impact with terra firma. I learned to keep some power on through the flare to make things slightly more predictable - no problem on a V-bomber runway, but not a generally accepted technique!
We had to fly the things 'single pilot' - with just nagging and moaning from the QFI in the other seat. His only 'multi-pilot' activity would be to raise the landing gear after a touch-and-go - the PIC did radio, navigation and poled the brute. We rarely used the autopilot as it was horribly unreliable and could generate rapid short period pitch cycling....
The Astazou starting sequence was hilarious; a starting brief followed by lots of fingers pointing at various light and gauges, then the necessary switchery needed whilst the abortionate French engines wound up. There was one brief which always amused me "Co-pilot, you are to restrain the flight fine pitch mechanical lock lever!". Restrain it lest it rise up and smite thee, or what? It was more pleasant to fly on one engine than on two, because the performance wasn't much affected at the heights we used and it only made half the noise!
We were supposed to taxy the pig using nosewheel steering which was incredibly stiff and hard to move on cold days. Even though it taxyed very well using differential power and brake, thanks to the wide track undercarriage, that wasn't allowed by the CFS gurus.
As for systems, I recall that it had about as many different methods for producing electricity as could be imagined - short of the Wimshurst Machine and Van de Graaff generator. Batteries, starter generators, alternators, inverters.....
Awful sodding thing. As I commented to one QFI, "If it really is this hard to fly from Doncaster to Nottingham at little more than 2 miles per minute, I'd go by train!"
Oh and by the way, GPS is better than ADF.