The 206 is a workhorse. It flies like a 182 which flies like a 172 which flies like a 152. It's a single engine Cessna, enough said.
In my opinion, the turbo model doesn't merit much unless one is doing a lot of high density altitude takeoffs and landings. I spent a lot of time working 206's in and out of 10,000' density altitude one way dirt strips, and the turbo just takes up weight that could be filled with paying passengers and cargo.
The older 206's have the IO-520 in it, the newer ones the IO-540. I'm partial to the 520, having run them in a number of different light singles and twins. Nothing wrong with the 540, but I like the 520.
You'll find all kinds of mods and flavors for the 206/207. I've hauled passengers and back country cargo, flown skydivers and cameras, chased big horn sheep and tracked hazardous waste smugglers, done rough field charter and aerial photography in them, flown them over forest fires, lifted people and gear in and out of remote airstrips, done grand canyon tours in them, all sorts of things. Great airplanes.
They've got a few little "gotchas" that one should be aware of. The extra fuel drains under the belly in the kidney sumps at the base of the wing struts are one...a lot of people miss them. The cessna fuel flow fluctuation procedure is another....the one in the book can cause an unrecoverable engine failure, if followed. Another is the long range tanks; fill to the bottom of the filler neck and you're an hour short on each side. I've known a couple of pilots who made unplanned off-field forced landings as a result. Plan ahead.
The 206 is a great utility airplane when you've got a lot to haul and you want to do it from a rough, nasty, short, high density altitude airstrip. It's one of the single best back country haulers out there, even today, and it still makes a nice family go-to-church-on-sunday machine, as well.