I always say for every ICO that they should ask the 4 magical questions:
1) What is the size of the Market the token is addressing ?
2) What is the role played by the token in the market ? Is central ?
3) How capable is the team to deliver the token to be successful ?
4) Is the Hardcap Vs % of token distributed reasonable ?
If all the 4 questions have "yes" as an answer, "go for it".
For the current ICOs that you are investing, I would you answer to these 4 questions ?
Som more:
5) Is there any traction the project has? Or is it just a vision?
6) Is there a real need on the market for this product?
7) How deep the team sees their own market? Do they have real roadmap to make a sustainable business on their idea?