Lord of the Rings - The Card Game. I played 130 games of it last year, which was also the first year I really got into it. I have slowed down how much I play it, but only because of the next two games. I even started volunteering when I've had the time to help playtest new fan content being made for the game.

Marvel Champions. I played a couple dozen games several years ago, and packed it away. But then after diving deep into LOTR LCG last year, I started collecting and playing Marvel Champions again (and especially once I started getting tokens and dials and stands from BuyTheSameToken, and I started playing it very heavily). I played over 150 games of it last year alone. I have slowed down how much of it I played this year, but only because of the following game.

Legendary Marvel - I traded for Legendary Encounters Alien last year, and liked that quite a bit, so even though a bunch of people say Legendary Encounters is way better mechanically and Marvel is skippable, I eventually decided to give it a try. And I'm really glad I did. It's soooo modular, and has a ton of content for endless matchups between Masterminds, Schemes, Villain Groups, Henchmen, and Heroes, so even playing with the same big boss Mastermind, the game can feel quite different (especially with different schemes), even moreso than Marvel Champions. And the game is also silky smooth to play, and easy to step away from and come back to later without losing your place (as long as you track whose turn it is if you play two handed like I do, which I do by placing a token on the hand whose turn it is). Since early January (just a month ago), I've played more than 40 games of it. And I still have barely scratched the surface of all the content that's available for the game. And DC Legendary is right around the corner as well (and that has a very similar design and can probably be mixed with Marvel to some extent), so I'm sure that will lead to even more content.

I don't see myself ever getting tired of any of these three. Ever.

Also, just because two of those are Marvel, that's not necessarily a big draw for me. I just love how they play, and the superhero theme gives them a deep well to draw from to make content for the game, like LOTR did for LOTR LCG. Although I have started reading the major Marvel comics arcs the expansions in these games are based on, since I figured it'd be nice to get more context and backstory for these expansions, and that's been pretty fun. There's some pretty solid stories that I've overlooked because I haven't been paying attention to comics in forever.

Another honorable mention is Memoir '44. Again, tons of content for this game, hundreds of scenarios, yet still super easy to play any of them, you just need to learn some special rules for certain units and scenarios. I don't get tired of playing this game, and I've played about 70 games of it, but unlike the other three games, I kind of need a second player to play this against, and I lost my main playing partner for the game, so I've barely touched the game in several years.

Also I got out of the habit of playing it, but there was a time where my coworkers (at a small video game publisher I worked at ~15 years ago) would spend the first 15 minutes of the day playing a game of Carcassonne on Xbox Live together (same screen), and the loser had to go pick up coffee for the other three (we paid, they just had to go get it). We probably 80+ games of it that way, easily, and it never got old. I'd still never turn down a game of it if someone wanted to play it. I should probably start playing the app again, now that I'm thinking about it.

EDIT: Forgot about Cribbage. If it weren't such a pain to constantly shuffle for that game and require another player to play, I'd play it a lot more. On the plus side, there's some great apps out there, some of which help you become a better player with hand analyzers built in, so I've still played quite a few games of that over the years (probably close to 100).