For us what was important was a big kitchen with plenty of counter top was a must for the wife. Big shower in the bathroom, washer, dryer a must. Two couches, NO recliner chair, had it on my first coach and we needed more seating for guests. French doors to the bedroom. We did not want the huge slides that when you pull them in you can barely walk to the bathroom. Quality woods used for the cabinets was also important to us. We have Walnut. Ceramic floors and corian tops.
I would have liked the television that folds up to the ceiling.
But to ask others about floor plan is kind of crazy because every person has their own idea as to what they want.
Some coaches are beautiful on the outside with all the gaudy paint schemes, but have terrible floor plans.
Good luck on finding what you want.
The original poster wanted to know about choosing floor plans, yet some are giving information about chassis. GEEZ!