BTW, while we're still on the topic of "best & worst", most of my opinions came from US game shows. Here's my best and worst on the foreign stuff you seem to not want to talk about much:
Host:
BEST: A tie! It's between Rob Elliott (of Aussie WoF) and Marco Antonio Regil (of Mexican FF). They seem to really enjoy the games they do (at least until Rob was in his final months on the show).
WORST: Any host of "Guerra de los Sexos" (a Venezuelan game show). They are WAYYYY too hyper.
Announcer:
BEST: Gotta appreciate John Deeks (of many Aussie games on the Seven Network). He's really enjoying himself.
WORST: I can't think of any, other than the "Megavoz" of "Mega Match".
Set:
BEST: The set of the Mexican FF from 2001-2003. It's very traditional to Mexicans.
WORST: The sets of all those Venezuelan game shows I see on Telefutura. They are cheaply built.
Contestant:
BEST: Virginia of Aussie $otC. Being the only player to buzz in on the questions during the "Fast Money" round and ending the game with $155 proves she's a smart woman.
WORST: Charles Ingram of British WWtbaM. And we know why.
Music:
BEST: 2001 music from the Mexican FF and current Aussie WoF music. They are extremely upbeat and catchy. I'd also include the classic WWtbaM theme tune, as it started in England.
WORST: The 1983 theme tune to the British FF. Banjos don't fit in well with England. In Canada or Australia, however, that's a different story.