Lately I've been playing a lot of cooperative games with a lot of clever card play, often against some sort of boss or some other win/loss condition, and usually it needs a lot of expansions so I can keep trying new combinations of heros/villains/scenarios. I can set them up and play a game or two solo most evenings.

So the ones I keep coming back to are Lord of the Rings - The Card Game, Legendary (mostly Marvel since it has so many expansions you can mix and match, but I also have and like DC, James Bond, and Alien), Ashes Ascendancy (also Ashes Reborn), Marvel Champions, Aeon's End, Arkham Horror - The Card Game.

Memoir '44 would be in that list too if you could play that solo. I love that game, but I haven't had a buddy to play it with in a long time. BoardGameArena has a great implementation but I don't like playing against random people on there as much. Supposedly there's a new app coming that will let you play solo, so I'm looking forward to that.

I've also tried the following recently and they're pretty high up too, they might eventually join the games above: Primal: The Awakening, Star Trek Captain's Chair, Marvel United, Boss Fighters QR, and Bullet.

Smaller, shorter games I enjoy include Cursed!?, Rove, Hoki, Fliptoons, D-Day Pocket, All is Bomb, Palm Island, and Harmonies