Any verbal subject that required what I suppose you would call "creativity" (e.g. English literature), though the mostly memorization type ones (e.g. History) I didn't mind. In high-school, I barely put any effort whatsoever in math and yet ended up a year ahead of the national curriculum. At the same time, I invested a huge-crap-ton of effort and time -more so than on any other of my subjects. maybe even combined- on English language and literature, only to end up with Bs in them in the end.
At uni (I'm a Math/Physics major), of all the classes Ive taken in the past 3 years, Ive really only disliked one and that would be the laboratory classes I was forced to take for first year Physics. Every single freaking week (for a term), after a 6 hour straight lab class on a single day, we had to write a 20+ page-ish "lab report": Id had to spend hours and hours researching an incredibly unnecessary amount of background Physics that went way beyond the details of the experiment (if you wanted good marks), doing the most tedious sort of calculations (error analysis) which were also in fact frankly unnecessary, and more, and in the end, all of this every week for the most boring lame-ass sort of experiments in Physics (electric circuits, optical lenses etc).
At uni (I'm a Math/Physics major), of all the classes Ive taken in the past 3 years, Ive really only disliked one and that would be the laboratory classes I was forced to take for first year Physics. Every single freaking week (for a term), after a 6 hour straight lab class on a single day, we had to write a 20+ page-ish "lab report": Id had to spend hours and hours researching an incredibly unnecessary amount of background Physics that went way beyond the details of the experiment (if you wanted good marks), doing the most tedious sort of calculations (error analysis) which were also in fact frankly unnecessary, and more, and in the end, all of this every week for the most boring lame-ass sort of experiments in Physics (electric circuits, optical lenses etc).