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#11
Interesting information and questions! As far as I know Comodo Secure DNS does not use https.
See: Encrypted connection - News / Announcements / Feedback - DNS
I prefer something that blocks connection to known malicious sites hence my preference for Norton DNS. I had looked at OpenNIC some time ago but as far as I can work out it doesn't offer malicious site blocking.
I see that it's one of the DNS servers that does support DNSCrypt project official homepage
You might want to look into that. Personally I've never used it but if you want encryption it might be the answer.