I'm probably rare in that I liked school. xD My favourite subject was mathematics.
Things I found pointless were:
Geography, Civics & Citizenship - a mandatory subject in years 9-10. I remember one of our assignments included standing by the roadside and counting how many cars drove past. I'm sorry, but how on earth does that bear any relevance to me whatsover? xD Probably the most pointless of them all.
Religious Education - pretty pointless, but interesting at any rate. So it gets points for that. xD
PD/H/PE - I hated doing sport. xD I was so unco-ordinated and clumsy. And the teachers were mean to me because I was shit at it. xD And the theory? Learning about 'decision making processes'? COMPLETE bullshit. xD But at least I did well in the theory because it was so easy (and pointless).
English - just didn't appeal to my black/white way of thinking back then. I liked concrete things, so I found English difficult to comprehend at times, due to the often bullshit interpretations we learned regarding a given text. English was one of those subjects you could totally bluff your way through. xD I managed to top English from about years 7 to 10 (I enjoyed writing essays, which is probably what saved me)... and then it got even more ridiculous after that (or everyone else got better) so my grades in it started to slip. xD
I'd probably be better at English now, given the very grey areas I'm learning about in my medicine degree. xD
Definitely NOT pointless subjects:
MATHEMATICS - my love. Teaches you logic, discipline, order. And, funnily enough, creativity. Maths is about solving problems. There are multiple ways to solve problems. So if you try it one way and it doesn't work, you can try it another way. It teaches you to be flexible.
English - if it was taught better. xD Well, if you read widely (which you can technically do without studying English... xD), you get to expand your vocab as well as your general knowledge and understanding of the world. I don't think that's pointless at all. Basically, I enjoyed the basis of English, just not how it was taught at school.
Languages - as I said, I studied Latin for a few years, and the knowledge it gave me of English grammar constructs is invaluable. To this day I am constantly drawing on my Latin knowledge to write awesome-sounding grammatically-correct sentences. xD And I know Latin isn't spoken anymore, but I found it to be such a pure language. That, and 70% of English is derived from Latin, so if you come across any obscure words in your day-to-day wonderings, just think about what word it looks like in Latin, and voila. =) I'm so glad I studied Latin because now it makes it that much easier for me to learn and remember the names of certain diseases and all the different parts of the body. As for languages that ARE still spoken, well you can't argue much about them - they're definitely not pointless. xD
Other subjects I took were Physics and Chemistry. They are of a moderate pointlessness level. xD Can be applicable and relevant, if you choose to study science at university. But only interest value if you don't. xD
Sorry about the long post. xD Like I said, I liked school and I think education is seriously important.