My $0.02:
I had a HT shifter on my '81 GoldWing Standard, my 98 Valk, and I have one on my '95 Heritage.
All of them had full size floorboards - it didn't look out of place.
I can't put floorboards on Isleen - I scrape too much of the pegs as it is - so she won't have an HT shifter.
Cheers,
Steve