I always hated History. It was so boring (maybe more so due to the way it was presented to us in school). Also most of my History classes were either in the 6th or 7th session (i.e. 1-2 hours after lunch). Thats when you get the best sleep after having a sumptous meal. I have got thrashings from my History teacher for sleeping several times during his class. Later, I mastered the art of sleeping with my eyes open. I always study for History exam the night before the test. Lot of mugging up work we did. For History, we tried to cheat the most during the exam.
Also I am more of a practical guy and also disliked subjects where I had to gobble up lot of information and vomit it out on paper (also includes Geography, Biology, etc). Math, Physics, Computer Science and Chemistry were the most fun (though the Math level in our schools when I studied were incredibly hard, I still love the subject). The chance of acing the exam and getting full score was so delightful.