I definitely prefer learning something for pleasure rather than for academic purposes. Like, I would rather read a book to get personal enjoyment out of it rather than to learn something for an exam. It takes all the fun out of it.
So I try and engage with what I'm doing, and try to enjoy it on a personal level even though at the end of the day I'm doing it just to pass an exam.
It's a shame that you haven't found a subject that you're passionate about yet. I didn't find out how much I love philosophy until I started it in Year 12... and I was just like... 'wow this is so awesome!' xD
I do get a lot of satisfaction out of studying it, because it's directly related to me and the sorts of things that I have contemplated so many times before in the past in my own free time. It's more fun than work for me. I do feel dislike for it at times, because the IB course is so restrictive and I would rather just learn it at my own pace and in my own way, and not be forced to do things I don't want to. But I just have to get over it and embrace the subject as a whole. I am incredibly passionate about it, and that makes me lucky. But I am also doing it with the hope of improving career prospects. That is the main purpose of me going to university, but I chose the subject I chose because I love it.