I was talking to a friend of a step parent who was a practicing CPA from about 30 years old to about 85 years old (and still sharp as a tack to this day).
We were talking about PITA clients and I mentioned my engagement letter.
In all the years of his practice, he never used one.
He went on a handshake.
If there was an issue, he would tell them in his Bronx accent (in a nice tone) , "don't give me that BS, you know it takes a CPA a few weeks to complete a tax return (for example) - this is your fault and you know it - you can sue me or go (you know what) yourself". And he'd laugh. This is his personalty, and it is quite magnetic, actually. He never loses his cool and he tells you things very directly and colorfully.
Clients LOVED him and he was never sued.
How loose of a cannon was he? Was he extremely lucky that he never had any real problems?