I learned about a thing called the Four Pillars in Chinese Astrology. Thought that it was pretty fun that in addition to having a zodiac animal for your year of birth, you also have one for your month, day, and hour too. There's also elements/colours involved which make dozens of combinations, so that's cool...

I've had a dumb interest to try an mash mine together into some hybrid thing for years. I like the idea that the outcome in a mash-up would probably be pretty unique from person to person.