Adventures is by far my favorite expansion. I will admit I was not a fan of DA at first. It grew on me. I do like the combos that expansion offered but a lot of cards seemed mediocre or weird. For instance Death Cart and Poor House are rarely viable. Mystic is okay, but not great. Pillage is often not all that great. You then have cards like Cultist.
Now, with Adventures we have cards that really warp the game, but in a more positive way that adds a lot more decision making. This expansion is pretty complex and on top of that adds more cards than any set in history before it, so figuring it out is a challenge. Page and Peasant change the game so much. Also, many of the Events are pretty game breaking. I just played a game on the Development Build where Pathfinding and Training were available and the best target was Vagrant. I literally won the game playing a bunch of Vagrants each turn.
It should also be noted that events make strong cards stronger, but as mentioned above, even weak cards can become strong all of sudden. It should also be of note that the set has very little duds, even the weak cards aren't all that weak. I think the only two cards I don't give too much thought about are Miser and Messenger. And, hey, on some boards you need some sort of trashing or +Buy. Although, Messenger does also add a small amount of pile control.
Overall, Adventures changes the game, dramatically...much more so than DA. This is not really a strike against it. More combos are possible, and now, there are so many decisions. Just adding two events offers a lot more choices. Then, add a Peasant or a Page line and now you're asking yourself "do I open this or get a second trasher?" Though choices arise in Adventures heavy games and then you have Reserves and then you have to ask when it is the right time to call stuff back into play.
For people who don't like to think as much while playing Dominion, this set might be too much. For people who wanted a more complex version of Dominion, Adventures is the set for you.
And, to think, Empires is just around the corner...at least irl.