I liked a lot of the "alternate" hosts if you will...Kennedy was great on TPiR85, Jim Peck when subbing for Jack Barry was good, Bill Cullen was of course Bill Cullen on $25K pyramid....
However, my vote for miscast host goes to Louie Anderson. When I can't watch a game show because the host's voice annoys the piss out of me, that's *bad*. And just his delivery..."Show me restaurant, is it up 'dere?"