Fair distribution. No proof of stake or initial coin offerings. I want an altcoin distributed through proof of work.
A good team of developers. This can be argued, but please do explain why you think the team of your altcoin is one of the best.
A growing community. I believe a community behind an altcoin should be positive and optimistic especially during bear markets.
The choice here needs to be driven by a sector approach I believe for the long term. I personally believe most altcoins now are marketing ploys that need to be avoided. For the long term I believe the energy sector will go through a revolution with decentralisation as well as deregulation, and the right projects here can dominate due to the ultimate size of the underlying sector. Eventually such tokens with real intrinsic value can be a competition to BTC, ETH etc.
Of course the set up with ICOs is dominating at the moment, but I do not think one should be nervous due to that - it is all about choosing the right project.
Prosume Energy has unbelievable potential, check out their website and whitepaper.
https://prosume.io