I'm still hanging out in Cali so here's Rebecca weighing in with some thoughts on simplifying...
Simplicity in this case means that we all share a standard set of products. One soap, one shampoo and conditioner, awesome proraso shaving cream for mommy and 1 tube of anti-fungal whateverthehellitis for one husband (*gag*). Our linens are kept to a minimum: 1 white towel each, face towel, one standard grey bathmat and 1 adorable baby bath hoodie. I, of course, have my secret stash of mommy necessities, but they are carefully distributed in such a way as to not appear cluttered (a small sad bin in external linen closet in the hall).
Knickknacks are nowhere to be found. Cutesy trinkets designed to make me look like I just traipsed in fresh from the Provence countryside (presumably to pee) are verboten. No soap-on-a-rope. No Bathe-Me Elmo. The bathroom is a place where things get done.
The guiding principle is that I should be able to take a fire-hose, and clean out my bathroom if needed, with minimal loss of product. Given the 3 others I share my bathroom with, that eventuality is a very realistic scenario.