Spinners: Easy to make and sequence for.
Coro Flakes: I've never made one, but they are cool and dramatic.
Net Lights: Arranged in "bars", a la piano keys or marimba/vibe. Make 12 "bars" and you have an octive (I would make 8 or 16 simply for channel utilization.)
Face(s): My roof doesn't have a steep enough slope to pull this off and have it look good from the street. But faces are becoming quite popular among the community.
You could always get 8 reindeer with Santa and his sleigh. Possibly add a Rudolph with a "smart" nose. It limits sequencing possiblities though, IMHO.
I'm outlining my roof line next year. I'm not sure how I'm going to animate/work that into my show, but like you, I'm sure my roof feels left out.
My 2 cents.
Good Luck.
Steve