NXT ... likely goes on the list but i like to see camp NXT whine 
NXT is alive 22 months and is in constant development. It's scheduled to have a hard fork in the next few months with new features, and new releases of the software are coming out every few weeks. It's much more mature than many other coins already included on your list.Also, I'd add to this list BTCD, as it's a backbone of SuperNET and will soon have a decentralized, trustless gambling.
I'd also put a vote on BTS because of it's steady development.
GRID and NEM and Qora ... maybe ... slim chance ...too exotic
I'd like to point out that you have a PotCoin on your list... I'd call that exotic. Also, you misspelled "PPC" as "PP" on your list.