I would say that trivia shows are actually my least favorite, especially something like Jeopardy where the questions can be so out there and ridiculous that only people with insane memories and lots of free time to take in useless facts will succeed. I guess I don't find that all that impressive. I prefer word games, like Lingo or Chain Reaction, which require intelligence and
problem solving skills.
I also really liked Supermarket Sweep and Shop Til You Drop back in the day. Not sure what the appeal was exactly, they were just damn entertaining.
I do find it kind of funny that you say Wheel of Fortune has silliness and gimmicks; compared to a lot of the game shows on TV now, it's downright somber!
I'm trying to think of other shows I've liked over the years...I enjoyed Family Feud only during the Richard Karn years, not a fan of the other hosts. Two shows that my family loves which I could never stand are Match Game and Press Your Luck, now those were gimmicky and full of silliness.
Others I like include Double Dare, Password, I've Got a Secret, Where in the World is Carmen Sandiego?, What's My Line?, and Win, Lose, or Draw.
I was big into classic game shows in my late teens/early 20s when they had a comeback on TV for a while, so I'm sure I'm missing many of the ones I enjoyed from back then.