Widely reported elsewhere as being a nice guy..as I'm sure you know there's a large body of opinion that despite the flight being a technical success he was deemed guilty by association as a result of Schirra's behaviour (who was leaving NASA so probably didn't give a stuff) and as result ever got a second flight.
The NASA hierarchy eventually set the record straight in 2008 but it was a bit late in the day for Cunningham's spaceflight career:
First Apollo flight crew last to be honored | collectSPACE