I HATE with a near psychotic intensity 'pee in the shower' bathrooms, as I call them, OK you are not actually peeing in the shower, but even socks in your shower well, urgh or scrathcing it with your shoes, or even worse getting your socks wet from the well. Not my cup of tea and if it means having huge area taken up with a decent end bathroom then so be it, att least it isn't half your space taken up with a fixed bed and mostly unusable for the rest of the day.
One of the main reasons for buying the Bailey Champagne Series 5 was the end bathroom and the shower, bigger than my mothers in her en suite at home, the series six layout is an improvement and I await the Arizona Series 6 with interest, as will my bank manager come nearer the time.
Also maybe not something the well organised caravanner should admit too, but a largish bathroom does give a little bit of space to ... I am almost to shameful to say it allows a certain amount of 'putting things out of sight' in a purely none dumping fashion.
I know some feel it is a waste of space and maybe for those who use site facilities more can justify 'better utilisation of the space, but for someone who prefers their own shower then an end bathroom is a must IMHO.