What are the prerequisites for pursuing multiple engineering disciplines?

[Astronuc]

Well, I would like to (and will) be, an Electrical, Nuclear, Computer, Molecular, Mechanical, and Astronautical Engineer.

The goal to be an engineer in 6 disciplines is rather impractical. Each of these engineering fields encompasses numerous specialties. For example, one can do electrical systems or instrumentation and control in nuclear or aerospace, or one can do mechanical/structural engineering in nuclear or aerospace. Molecular engineering is considered a specialty in chemical engineering or nano-engineering, and one would likely need to specialize in certain subfields.

It would be more practical to pursue one, perhaps two fields, and more importantly become proficient in the selected fields. Nuclear + mechanical, mechanical + aerospace, electrical + computer, . . . . are reasonable pairs. Aerospace + nuclear might work if one is interested in nuclear propulsion systems, but then there is little demand for that field since there is no viable program at the moment for nuclear propulsion despite positive statements from organizations which promote such ideas.

In these six disciplines, what applications or areas of most interest? In other words, what does one find interesting in electrical engineering? nuclear engineering? computer engineering?