Worst car: I have 2 in no particular order
1980 911sc.
I was absolutely green when I bought this car. Found it on the classified here. It was a complete piece of junk. Had been in on big rear end accident. Had rust through the door jams, through the front bumper mounts, and the bottom of the windshield. Yoy name it, it was broken. It was my introduction to the hard knocks of porsche ownership. Only good that came of it is I learned a lot and probably broke even on it after parting it out.
1969 911e
No fault of the cars, but it was a terrible period of my life.
Best: 1987 930
Got it from a great PO. Rebuilt the engine myself (knew it needed it going in). And I've had my kids in it and have been able to share the joys and tribulations of vintage cars with them. I hope to have it for a long time, and want to create a lot of family memories with it. I'm glad the interior is beat up because I don't have to worry about them climbing all over it.