As a full timer with only fifteen months limited experience, and zero RV experience prior to that time, I would have to say "full timer" is an extremely broad term, and defined quite differently, depending on who you ask. As stated above, there is no "right" way.
The one thing we see that is "common" is actually living full time in an RV. How that looks is a different story.
You have full timers who work full time, work camp, or are retired. You have full timers in Class A's, B's, C's, 5'ers, etc. You have full timers who have a permanent lot, some who rarely use a commercial campground, and others move monthly, weekly, etc. from national or state parks, to commercial parks, to condo style RV parks, etc.
Most all would probably agree that the ability to be when and where you want is a very key ingredient. They would probably also tell you that being time urgent is not a very suitable personality trait, nor is the inability to flex your ideas of where, when, or how you do things. Your ability to adapt to new information is very critical.
I would also venture to say that full timing can be different dependent on which part of the country you are from and which parts you want to full time in.
All of this to say that the more people you can include in your sample for your interviews, the better picture you will have of how full timing will work or not work for you. Experience is a great teacher, but only if you are willing to learn.
And, by the way, we absolutely love it!