Aside from the current ones on my portfolio list, I don't have any specific altcoin list that will be on my watch.
As usual, I will depend on my future picks based on their price behaviour.
To name a few: (newly added on my list)
IDEX
NAS
DATA
VITE
Great list here mate, I also have IDEX on my radar and VITE and Bitgesell too.
In any case though, if I don't want to complicate things, I will just stick to my usual top 10 altcoins which I have invested early by not selling them at the moment.
and then pick some at the 50-100 list, yeah I know it might be difficult as usually this coins are used for p&d but who knows I will got luck to choose that will give me good returns in the future.