If considering a job in this field I think its best to have a therapy background or a caring background. Be prepared to work hard, it takes alot of effort to help create the perfect environment for others to relax in. Work well with others and help your collegues it makes for a friendly workplace and you never know when you will need their assistance. An interest in sales and marketing would also be avantageous, as you must be competitive with other spa's offerings.
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.