To be honest I focus more on the team's credibility and the concept that they are trying to implement. Other things like Whitepaper, roadmap and community comes later. In my opinion ICOs should be invested on based on the information they provide about their plans of future rather than the financial information which can vary from ICO to ICO.
Yes the team composition is one major thing. Check out Formosa Financial team and it's clear they are credible for the ongoing project they have