A few of my P car buddies have driven mine and my wife but that is it. The wife is afraid I will divorce or never forgive her if something happens while she is driving. The P car guys, I trust as they have treated like their own.
Anybody else, no way. I view it like a motorcycle, "You drop it & you own it", plays a lot better when there is not as much money involved as there is in my car. Easier just to tell people that I let nobody else drive it.

Valets - never in the P-Car and I do everything in my power to avoid it in any of my cars, including my company car. To me it's a huge inconvenience. I then have to worry about securing all of my personal items, and then I have to pay? No thanks, luckilly my feet still work fine. I will walk.

As for the gas in Oregon, it would drive me nuts. I have a friend that had an attendant hit and chip the paint on his car with the gas nozzel going in. An older all original 911S. Guy didn't have a clue. Once again, no thanks!

It's not so bad in small town station where you are known...I pump my own.
Never for Valet parking...any car. Friends drive? Sure..only one bad experience with that when a friend went from 5th to 2nd enter a rest area in the P-car. He owned up, offered to pay. Once he got home, his wife had other ideas...so now an EX friend.

With the Mustang? Sure...any friend. It's only a Ford with no real paranoia hooked to it.

a friend of mines wife nagged me to death to drive my 928, finally broke down and you know the rest. She muffed up the front end. Nobody but me drives the 944.

I should let my wife answer this for me. I'm sure she'd love to vent about how anal I am about this subject.
I'm trying to take a different attitude about letting friends who've helped me work on my SC drive it too, with me in it of course. Getting it smogged is real nerve racking as EVERYONE keeps their hand on the shift knob.
I've offered to let my son drive it, but he turned me down. I'm not quite sure why as he can handle a stick well. Maybe he just wasn't wanting to hear dads instructions, again. My wife and the SC, well, she hasn't even ridden in it much and I don't want her to find out how really easy it is to drive, so I'm fine with the situation as is. I rarely let her even take my daily driver Honda, mostly 'cause she hates leather interiors and white cars and, you guessed it, that fits my car to a Tee.
In the end though, I'm really up for giving people the experience of riding in the SC just so they can say they've been. My brother had his Speedster for 15 years before he even offered me a ride in it. He's never let me drive it, though he did loan me his '67S for the weekend during the Historics one year so he's not all bad.
I cringe at the thought of valet parking even in the Honda. Never will do it in the SC. Like Vasin, I've worked to hard for it to have some yo-yo screw it up.