Stratis is a fantastic one, that's for sure. Had a bunch for quite a while now, sold back everything to recoup my initial investment . . now time to ride the wave!

As far as my other holds for 2017 - in no particular order:

Library Credits. Has seen massive growth and has a very cool concept of a decentralized peer to peer service. Like YouTube or iTunes without the middle man. Recently has blown up really nice.

XtraBytes: This is my diamond in the rough. The tech is not out at this time, but a new way to verify each block on the chain through the Proof of Signature algorithm . It breached top 100 on coinmarketcap and is traded currently on low volume exchanges like Cryptopia and Yobit. I'm witnessing the dev team come together and begin to implement the project. As a multiple node holder, I am invested in the project, but I see true potential here . .
https://medium.com/@xxxxxxxddfeutt/how-the-xtrabytes-blockchain-works-69979081bf42

Other notable ones: Expanse, STEEM, TRST, MAID, and my longshot is HyperStake.

Part of the fun is researching these different projects and finding the relatively unknown ones with massive potential