Good question. I would be interested in having ANTs (æternity native tokens). I saw on GitHub we already worked on the specification of ANTs on a specific branch: protocol/tokens.md at native_tokens · aeternity/protocol · GitHub
I would like to bring up that topic again. For me AEX-9 is interesting but as far as I know it won’t be possible to deposit/withdraw AEX-9 based tokens into/from our native state channel implementation. That’s why I hope we will see ANTs in the foreseeable future 
But before that happens I hope to see [Withdrawn] State Channel mobile client being implemented
The 2nd thing I would like to discuss is the possibility to become a registrar of subdomains in the naming system.
It might also be good to think about a better/improved auction mechanism for AENS names. For short names it could take years for auctions to be finished right now and we always see the current bid. If possible we could introduce a vickrey auction mechanism as mentioned in the documentation:
These are the main topics for me personally right now 
Edit:
- the main priority in my point of view should be to provide tools to make the usage of state channels as seamless as possible and production ready