I work at a law firm that handles real estate.
Thats great , also a random fact is that in english common law, real property is land which is the property of some person and all structures . 
Yes it is and it can get complicated sometimes.
Yes it can be.  I also found that personal property was and continues to be all property that is not real property
That is true and then there is also intellectual property too.
Very true, also in real estate they call intellectual property IP for short
Intellectual property is probably one of the most complicated.
Thats true, it also includes other types of right such as trade secrets