I watch shows like this more for the apartments than for the "story lines." I did find it odd, yet charming, the three men who were so close to their mothers, but a little off-putting that they took mom along with them (well, two did, I recall). I'd kind of wonder at my potential roommate who needed his mother with him to look at apartments.
I forget which one it was -- the Nashville woman? -- who ended up taking the apartment with the two roommates. I was hoping she wouldn't pick that one, because they were kind of creepy with their rules and demands that the roomies hang out together in the evening. I'm renting a room in your apartment, not signing on to be your friend. If it happens, great. If not, so long as we're civil, that's fine.
I knew a married couple who had a roommate, so that didn't seem that weird (then again, they had a house, not a small apartment).