(this question has nothing to do with MH or being a "Moodie.")
Took judo in Grade 7 - doesn't count.
If I had extra $, I would take maybe Krav Maga - it was invented by a Jewish guy in Bratislava (?) who was sick of anti Semitic thugs. (years ago)
I believe it's used by the Israeli (and Russian?) armed forces? It's a combination of other martial arts.
There are other Russian self defence methods........I forget the names.
Why am I interested? - I'm old (68), in a dumpy neighbourhood, fitness, the world is more and more dangerous. Exercise.....confidence.
Peter