I'm extremely glad to see you championing Hive as a layer 2 solution. I've thought that Hive could serve well in this role for a while, and I think the power of this blockchain could easily be compounded by existing L1 protocols like Ethereum.
If you could have any existing dApps from the Ethereum community use Hive as an L2 solution, which would it be?
That's a great question, and I wish I had a correspondingly great answer, but I only have a "press release"-level acquaintance with dapps on ethereum other than some of the token dapps used for ICOs. I haven't even had time yet to research in depth all the apps and dapps on Hive.