Here's our current rotation:
Dominion (and we have the Intrigue expansion set)
Ticket to Ride Europe (plus 1912 and Alvin & Dexter expansions)
Monopoly Go! card game Monopoly Deal card game
Life
Guess Who
Clue
Strat-o-Matic (2004 season)
CandyLand
Life, Guess Who, and CandyLand are, of course a nod to having younger game players. Strat-o-Matic is currently an affliction that only my 12yo and me share. I'm sure that in time the 6yp and 4yo will be sucked in. Am I wrong to see all weekend long playoff-style tournaments in my future?
Monopoly
Go! Deal is a fun little Monopoly-branded card game that is cheap (probably no more than $5.99) and surprisingly satisfying from a strategy standpoint, with game mechanics that are simple enough to grasp that kids catch on quick. It also has the added benefit of beiong able to knock out a series of three quick games in 15-20 minutes. A perfect stocking stuffer for kids who like games.
Related, I was pretty proud of my 12yo last night. He hammered both my wife and me in Ticket to Ride, using both expansion sets, despite having the worst hand of Destination Tickets of the three of us. He came up with a pretty creative way to win, showing real promise as a strategist. Fun stuff.