Well.. I will give you my .02 on a PC-12. I flew it full time for a construction company for about three years averaging around 500 hours per year. It is a great airplane for what it can do. The cargo door really is useful and never had a problem filling it with people and bags for a 1200 mile trip in and out of a grass strip. I however never liked the whole single engine thing. Dont get me wrong its safer than many things one can do but at night, over the gulf or mountains, in weather was NEVER a fun thing. I dont care how good of a pilot you are, things will go really bad given the right conditions in a single engine. I know they say it never fails but i have had two turbine failures in my day, one in pretty nasty weather and I am here to tell you that the second motor humming out there would make me pay 10 times the operating costs when you need it. But again in the grand scheme of ways of transportation its a pretty safe way to go
hope this helps