I really don't.

For many, many years I thought I did. I'd have a brief surge of interest for a few weeks, and then get completely bored of it. I'm not someone who finds it inherently easy, so boredom + difficulty = failure.

When I was foolish enough to do this in university, it meant doing great in the first few assignments, and then abysmally in the exam.

So my policy now is to never study maths for its own sake. Only when there's equations in a computer science paper I don't understand.