BTW, you're not the only roller skater on the boards.
LOL, I'm not even that, though Coach Roller Dance would be over the moon if I showed up in quads, I'm sure. I know there's a few artistic inline people here, but I was under the impression it was almost universally considered "the least worst alternative to ice skating". (So, if you're here on wheels by choice speak up!)
I see some skating tricks that you can't do on ice (like spinning on the back wheels).
I think you could spin on the heel corner of an ice skate. It wouldn't be inherently stable like a normal dragged-drag-pick spin, but with practice I can't see why it couldn't be done, at least for a few revolutions.
They *ARE* inordinately proud of their travelling 3-turns-into-twizzle-into-camel thing. Coach Roller Dance made a big show at a LTS of showing it off, and telling all that it's something you can't do on ice (which I'm personally not convinced of).