Wow! we have experts
Hoosier Welcome
Elena
Seriously, what one person loves will drive another nuts. Just need to figure out how you want to use it and go from there.
Size, not only what you can handle, but what will fit into say a state park or Federal sites should you make that a priority.
Boondock? Tank size and alternate power sources will be important.
Travel often or move a little and sit for a month?
What hobbies if any you wish to take with you.
Children? (2 and/or 4 legged
)
Do you want to be able to shower in your RV or do you plan to use the facilities. I know some people who never use the bathroom in their camper. Afraid it will leak or something
Play house in the unit and see if you have room in the shower, comfy on the can. Can make the bed. Sit at the table and comfortably watch TV from the sofa or do you want recliners. You get the idea. Many are flashy but heck to live in. There is an RV for every style out there.
Have fun and explore.