Sure! First, while I’m in no position to judge cryptographic algorithms, the success of cha-cha and 25519 speak for themselves. More prosaically, patriecia/critbit trees and his other tools are the right thing, and foresighted. He’s not just smart, but also prolific.

However, he’s left a wake of combative controversy his entire career, of the “crackpot” type the parent comment notes, and at some point it’d be worth his asking, AITA? Second, his unconditional support of Jacob Appelbaum has been bonkers. He’s obviously smart and uncompromising but, despite having been in the right on some issues, his scorched earth approach/lack of judgment seems to have turned his paranoia about everyone being out to get him into a self-fulfilling prophecy.