I think many of you misunderstand handwriting analysis if you can compare it to asking about china dishes or schooling. It’s true that the most important questions in a shidduch are regarding a person’s character, and that is exactly what handwriting reveals.
I do believe that a full-fledged analysis is an invasion of privacy, however a quick check of handwriting for danger signals, would save a lot of heartache with warnings about violent or psychotic tendencies. (Dangerous or abusive people can very often put on a nice front during the dating process, and it is only after marriage that they show their true colors.)