I would advise somebody considering this job to talk to people who are engineers already. They should try to talk to people working in different areas of engineering as even when people do the same degree they can have very different day to day jobs, from full time office based jobs to full time site based jobs.
Also it is important to remember that even if you complete an engineering degree you are not limited to a purely technical career as there are plenty of other areas you can get involved in like project management or finance.
Realists are usually interested in 'things' - such as buildings, mechanics, equipment, tools, electronics etc. Their primary focus is dealing with these - as in building, fixing, operating or designing them. Involvement in these areas leads to high manual skills, or a fine aptitude for practical design - as found in the various forms of engineering.
Realists like to find practical solutions to problems using tools, technology and skilled work. Realists usually prefer to be active in their work environment, often do most of their work alone, and enjoy taking decisive action with a minimum amount of discussion and paperwork.