Just had to come back for another dip in these waters. Yeah, really fun. I thought I was obscure writing a sestina about a linguist, but a villanelle
about a local TV guy -- that's pretty nutso-cool.
Using a name for repetition in a fixed form takes some balls, but the overall oddness of this poem makes it work.
On this read, I found "rigid as a rock" to be quite flat compared with the inspired "sincere as a bream". Might I suggest the following:
"as stern as a frock"
"as stubborn as a clock"
"as rigid as writer's block"
"as stiff as a well-worn sock"
etc, etc . . .
One of the best examples I can remember of a name used as repetition is this sestina by James Cummins: Fling
Science flies you to the moon. Religion flies you into buildings.