I read white paper but not always, I follow ICO review expert and research on the project team of professionals.
Me too. To be honest, I don't read wite paper so often. I think almost all of them are promising. I folow the opinion of my experts. The best of them is my good friend in the team who feels nice projects 
Your own head, decision and responsibilty for them is needed no less than good companions. But if you can do it in a team, this is also a good option