I did notice that Eubanks sped through the Money Cards in the later run, but that may have been at the request of the producer in order to fit in the car game.
As for Dream House, I'm sure the excitement was more genuine because the chances of a couple winning a dream house were less than 50/50, so I'm sure it was more fun for him when the couple actually won.
Gene Rayburn actually got pretty excited when a couple broke the bank on BTB 85, especially the first time it happened. I think in his mind, the chances of it happening were slim to none. On Gene's last show, he clearly gave up about being excited in anticipation of the bank being broken.
Richard Dawson did care for the contestants on Feud, but sometime in the early 80s, he was no longer around to join in the celebration as the contestants jumped around.
Louie Anderson used to stick around after a family won on Feud, but after a few shows, he apparently told the producers he didn't feel comfy joining in with the celebrations, and he needed extra time to change, so he simply walked off after signing off.
As for hosts that didn't seem to care...
Anne Robinson- ok, it was pretty much an act. She pretty much treated any win like it was "nothing".
The host of Polish CrossWits- we watched Polish CrossWits at GSC9, and the hostess and host didn't look like they were having any fun, and the contestants didn't seem to give a crap either. The male host would take away any prizes (why, I don't know, I don't speak Polish) but the contestants gave no reaction.