...the nicest set?

Personally, I really like the Password Plus set and the set Match Game had in the late 70s/early 80s (with the starwheel and everything).

hmm....hard to say, since 70s decor isn't my fav, but 70s game shows are!

I think it's a toss up. Between Family Feud (Richard Dawson era), & Match Game.

THE PRICE IS RIGHT has decorative sets; MATCH GAME and FEUD, also.

The price is right

Double Dare(1986-1993 era)
Love Connection(Woolery Version)
The Price is Right(The First 20 seasons of the CBS era)
Wheel of Fortune(pre-1997 era)
Pyramid(Clark era)
Family Feud(Dawson version)
Card Sharks(Eubanks version)
Sale of the Century
Password Plus
Blockbusters(Cullen version)
Match Game(1973-1982 Incarnation)

Downs-Clayton Concentration, '60s Match Game, GE College Bowl-NBC Robert Earle era. Can't think of any '70s sets though.