Excellent. I'll be here awaiting your return. As for mechanical engineering, you can go as far as you want to with it. It breaks down into a lot of very highly specialized fields actually. In fact, the very term "mechanical engineering" is in itself a very generic statement. Think of special fields that fall under the category such as "thermal fluid dynamics" and you can see where it can take you. I'd love to be able to get a doctorate in engineering. Although, "Dr. Doelling" sounds kind of stupid to me.