Custodian you have had some amazing cars ( from previous threads you have mentioned them in ). I love the look of the Maserati Indy!Interesting question. Even the bad cars had some redeeiming features:
Rover SD1 probably the worst. Had 60 delivery faults. eventually caught fire and I was happy to let it burn.
Matra Rancho: terrible build quality but great for carrying our two German Shepherds.
AlfaSud: terrible rustbucket, but great car to drive: way ahead of its time
Maserati Indy: worst elctrics I've ever seen; forever blowing fuses
BMW750i: second worst electrics I've ever seen, but great V12 engine