Farkel, this is really interesting!
Can I add a few that I noticed from my son attending a catholic school?
RCC makes their churches, schools physically beautiful so you can enjoy the scenery around you as you listen to a blessedly short service (compared to JW).
The WTBTS seemed to go out of their way to make their halls so ugly & unadorned :) plastic flowers are worse than no flowers at all.
RCC schools encourage all to participate, my son, an atheist, is also a top student in religion & represents the school at debating & also has had speaking parts in mass & Easter services. They love it, because he's a good public speaker with a really deep loud voice. They know he's not catholic. Doesn't matter in the slightest.
I still find that strange, but also, really nice.