Alexander's Character

I cannot decide what to make of Alexander. On the one hand, he is depicted as a fairly benevolent ruler. He cares for his wounded troops, respects the dead of his enemies on several occasions, joins his troops while they're doing hard work, respects Darius' women, and spares the lives of several enemies out of compassion or respect (or so claims Arrian). Then on the flipside, he appears to be very proud and brutal on several occasions. He massacres the people of Thebes and treats the Greek prisoners of war very harshly after one of his first Persian battles. What do you think about Alexander?