I always really liked math in school, cause it was just logic and that appeals to my lazy side. I was good at it too.
The last 2 years of high school, however, I had picked the 8 hour math options (25% of total course time) and the fun was quickly beaten out of it by having to learn formal ways to write a proof. Saying the same thing in plain language was 'invalid'.
From that point on math felt more like learning a foreign language than about doing logic.