Well, the "Boarding School of the Supernatural" sounds real fun, and I'd look forward to participating in it. Just hoping for a cool underlying mystery plot to unravel together.

The "Guardians of the Crystal Rose" sounds cool in principle, but I'm not so sure I'd like having to play as a pre-gen character. Players generally want to make their own characters. The "Supernatural Arranged Marriage" has some potential for great funsies, especially if the arranged marriages are not quite perfect and not entirely mismatched, but somewhere in the middle (hope this description makes sense). 

All in all, I'm interested, with "Boarding School of the Supernatural" as the number one in order of preference.