I took art in high school, and didn't get along with my teachers at all. A lot of it was my fault because I had a lot of personal problems that must have made me a real pain to teach, but although my love for art was genuine and obvious, because it wasn't the right kind of art they never really tried to engage the interest I had. In any case, I wound up with a grade that was barely above failing, and I never wanted to take formal classes again. So I didn't, and I ended up taking a language degree instead. I carried on drawing in my free time, most of which was initially terrible because in my immaturity, my bad experiences with art classes made me shy away from the fundamentals. When I grew up enough to realise I needed them, I began teaching myself from books, tutorials, and from observing real life. With a lot of hard work, my art grew from badly-drawn 'anime'-style scribbles into what it is now, and hopefully I'll continue getting better.
So I'm mostly self-taught. At times I've regretted not taking an art course, or wondered how much better I would have been with it, and I've worked with artists and felt a bit envious when they shared art school experiences with one another. Still, in the end my language qualification has served me well in terms of getting a me job I love, and giving me some life experience I wouldn't have otherwise had, which has probably helped my growth as an artist in its own way.