...but I've not had many, 'cos I find letting go very hard
.
So, a short list of 3:
1) VW Beetle (3 of them!) - from my student days,
2) Fiat Uno 45S - first new/family car, fun and totally reliable (like
all my Fiats
),
3) Volvo 850SE Estate - the nearest thing to my Tesla, in that it could do just about anything you asked of it, with zero fuss. Persuaded by my (
soon-to-be-ex 
) wife to get rid of it, rather than fix it, post-MOT fail. Regretted that ever since ,and still looking for another one...
The
only cars I don't regret parting with were a few dull company cars, mostly Peugeot 405s, but also some truly sh*te pool cars (e.g. a Rover 216...)