I like Peercoin because it was the first Proof of Stake coin available and Ethereum in the future would be looking to do something similar to that as well.
But Ethereum Classic I don't see any real use case for it. It hasn't got any software application or Dapp's being built off it like ethereum. It is basically in my HUMBLE opinion riding the popularity wave off ethereum because they share the same name. If you know of better uses for ETC than ETH let me know.
RE: 3 crypto-coins to watch