I use Python because I love it, I discovered Python when I was around 12 or 13 years old, so a little over a decade ago now. Prior to using Python I was writing in "native" or "platform-locked" languages like Batch Scripting on Windows at my grandparents or Apple Script on a Mac at my friends house, which made Python my first exposure to the idea that you could write a single program and share it across computers.
That fact alone, and being able to share programs with others is sort of what sparked my entire interest in software as a profession, so I've been using Python ever since.
On top of that emotive bit, it's also from what I've seen the most perfect balance of expressiveness and utility. You can accomplish a lot of work in Python with a small amount of code, and the features that enable that aren't difficult to find and learn or hard to remember. (Generator Comprehensions)
I also find that when I'm whiteboarding or writing pseudo-code in my notebook, it's typically very close to executable Python. I'm not sure if it's that after all these years I now think in Python or if Python is just close to what everyone thinks of as pseudocode.