On a whim, I once played the lottery on the theory that the Many Worlds Interpretation is true, and some branch of me would win. I like to think he's out there somewhere.

Did you use a quantum random number generator?

(Of course, if MWI really is true, then some other me in some other branch would have played the lottery even if I hadn't, so strictly speaking I didn't even need to...)

There's no law of physics stating that you make all possible decisions in different MWI branches, though sufficiently different people who otherwise resemble you might.