Floor plan is a very personal thing. Your personal health will also influence your choice. Some people are much more flexible than the rest of us.
Some things we look for: Granted there is 3 of us.
A queen size bed I can walk around with night stands and power. Phoenix's BIPAP machine and I suspect a CPAP is in my future. Nice to charge Kindles when I go to sleep, etc.....
Bathroom needed a nice big shower and I hate the toilet in the closet design. I also like having an actual bathroom and not the shower in the master bedroom.
I find a table and chair more comfortable than the booth. Not a fan of the couch, I think a pair of recliners would be a better option. Also having the television in front of the chair instead of having to turn to see it.
I like having "public" and "private" areas. I like having my bedroom and master bath separate from the living room and kitchen area. I can have company without them seeing if I made my bed or if Phoenix needs to excuse herself she can go off to the bedroom and take care of herself.
Because of the GB we needed a bunkhouse and the 1/2 bath has been a blessing. When we travel it's nice to have easy access to a restroom as the 1/2 bath has a door to the outside. It also makes it nice if a friend or 6 GBs need to use the restroom, they don't have to walk through the trailer.
You also need to ensure you can comfortable reach all the controls (slides, lights, awnings, fuses, etc....) and tank dump valves and connections. Can you winterize without having to unload storage areas to get to the heater bypass valves. Can you reach the Fresh water tank or the low point drains. Can you get into a bay with a slide out.
If you have a camping buddy or two take them to a RV show and compare likes and dislikes. They may bring up something you have not thought about.
I also love this couples videos. Gone with the Wynns
https://www.youtube.com/channel/UCBo9TL ... CXFsCxOhmAhttps://www.youtube.com/watch?v=MWnd7cNWSBk Top picks under 30' they bring up some great points looking at RVs
Have fun looking and it's always a learning experience as our needs change.