We moved from a toy hauler that had a dry bath almost as large as our entire TC. Due to the size of TC, a dry bath would take up too much space and the wet bath was the best match. We always use our bath over a campground's, so it gets frequent use (this was one of the the reasons we have an RV over a tent or mini trailer). Given a choice, we prefer the dry bath so wet things can hung to dry while not impeding use of the bathroom. If we purchase a larger TC, a dry bath will weigh in our decision. As others have posted, the size and shape of the baths vary. Try a couple bathrooms to find which one fits you our spouse the best.
Slightly off topic: I do not find having to move the slide out slightly for access is an issue if it is on the curb/passenger side (it takes mere seconds). I would be more worried if the street/driver side has to opened when pulled off on the side of a road so I do not extend into the roadway.