The Real Estate Enthusiast Membership Level is for individuals who are accessing the site and information for the purpose of buying and selling their own properties, someone who "dabbles" in real estate but is not a "professional."
If you are looking to access the site for your own personal, non-business purposes such as an individual looking to buy a home or an individual who just likes to keep informed on the real estate market but do not need to sell a home then the Private Member option would be better for you.
If you are involved in real estate as a professional or as a business then you should join as a Professional Member. This could include people such as bankers, loan officers, appraisers, real estate agents, real estate developers, contractors, real estate investors and others.