I've only invested $5 each in Peerplays and Aragon currently. Based mostly on my belief in both of the concepts they're pushing. I'm still working on making a more or less a checklist form for myself using my criteria that I can use when evaluating ICOs before getting into bigger investments.

Edit: But I do plan on looking at Exscudo, Mysterium, and Patientory using what I've learned and what people have added to in this thread.