When I first came upon the meeting of Heathcliff, I assumed like all others that he was simply a pompous butthead.
But now, I believe he may simply be a depressed, but still arrogant man.
Catherine however seems like a little brat, from what I gathered from the passages Mr. Lockwood read in the diaries in the attic room, she and Heathcliff were both brats. I do believe Hindley rightfullly forbade them to speak or see one another.