Until I was about 14/15, it was straight As for me. We didn't really get graded in PE, but I was good at it too, although I didn't enjoy team sports.
The only thing I struggled with before then was reading on demand. For example, when I was about 13/14, every 2 weeks, we had to read a novel at home. I'm such a slow reader, that if I had to do this, I had no time to do anything else. I can read very well, I'm not dyslexic, I just struggle to keep my focus and regularly have to re-read pages, as my eyes have done the motions, but my brain hasn't taken in a thing (it's thinking about something else more stimulating). This was a recurring problem throughout my school years and neither I not the teachers understood it. I'm sure the teachers just thought I couldn't be bothered, even though I was a good student with everything else that was required of me.
But, from about 15, things got a little harder for me. As the work got harder, I could no longer rely on my memory to get top grades, I now needed to study and I couldn't study (probably for the same reasons that I couldn't read a book). I started to struggle with higher level maths more than anything, although I did manage to pass. I also found English quite hard, not the language part, but the literature, especially Shakespeare. There's too much multi-tasking involved in reading a Shakespeare play. But, I did pass this too.
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"We act as though comfort and luxury were the chief requirements of life, when all we need to make us really happy is something to be enthusiatic about." Charles Kingsley