I went from a "normal" western last name that was ethnically coded (like McCoy) to another ethnically coded name (like Nguyen, or - um - Fink).
My options were to keep a common and dull name that I share with people I don't like, get a new one (that I'd need to spell to every customer service representative ever), hyphenate (HELL NO), or make up something new (which would involve a shitstorm among relatives on both sides.)
The only real options were A and B. I was undecided until we were leaving the county courthouse after we were married. He asked me "are you going to change your name?" He didn't care. He thought it was a weird custom and was curious. And I realized - this is an opportunity. It's a relatively easy and socially acceptable way to shed your old name.
I took it.
The new name honestly messes with quite a few people who are meeting me for the first time, and it's interesting to see how they react. I've had people ask straightforward questions (I prefer that - there's an easy and straightforward answer), get half-way through a straight-up racist comment before they stutter to a stop (helps me get to know them), get all the way through a racist comment (again - helpful to know where you stand), or just not comment at all (just fine by me).
I've found that it's not the worst way to get a read on someone.
tldr: part spite, part novelty, part legitimately helpful when your profession means you need to meet strangers and get a quick read on their personality/potential biases/willingness to be straightforward when there's no reason to be weird about it