People often say I sound sad. I think it's because I'm a very serious person who talks in a very authentic, sincere way. But I think I'm so far in that direction that people can uncomfortable around me, thinking I'm depressed or something. How do I reverse this?

Part of the problem I think is that I'm very high IQ. What stimulates my emotions and makes me light up is usually what some professor writes rather than what stimulates most people.