The first expansion for 7 Wonders Duel, Pantheon, added some nice stuff and played well. The second one, Agora, just gave the game too much rules overhead and too many mechanics.
The first expansion for Onitama, Sensei’s Path, was good in that it only added new cards, so new options, which are always good. The second one, Way of the Wind, added a completely new mechanic which really detracted from the core of the game. Saw that there’s a third one out Light and Shadow, which seems to add hidden movement mechanics (?) but I won’t be touching it.
Continuing a theme, Pandemic’s first expansion, On the Brink, added some new roles and events, along with the purple disease, mutations and the bio-terrorist thing that could be interesting. We’ve played with that quite a bit, even though we mostly focus on base Pandemic these days. In the Lab, though? Never even touched the module, only played the extra roles and events (and they were a lot less interesting than the ones in the first one).
Terraforming Mars is one of our favourite games, so I was keen to try out an expansion. Prelude seemed like a waste since the problem it purports to solve, the slow start of the game, is not a problem we HAVE, so went with Venus Next. And promptly put it away. It added nothing and felt tacked on. Base game is plenty.
Never touched Onirim’s expansions (they came in the box). Read through them, didn’t seem particularly fun.
Think that’s it. Quacks’ expansions have been fixtures since we got 'em, and I have VERY high hopes for Everdell’s trio.