"3.- Proof of concept. We (the community) need to see that the people launching an ICO have invested themselves enough effort and resources as to have already some value backing their project."

This is, for me, the most important thing to consider.

Any person/people wanting to launch something new can show "A higher (much higher) degree of transparency and accountability" and "A more ambitious approach towards global challenges" for a certain period of time.

But having the perseverance to continue on, to believe on something they've created, having the commitment to their project is the biggest, at least for me, factor to consider before investing to these ICOs.

If we can see that they are really value their project, we already have the assurance that this ICO is worth it.