I love Wharf (probably could have guessed that from my avatar
) and most of the other Duration cards. When I first got Seaside, I thought Wharf was pretty good, not great, and I never touched Caravan. Now, they're two of my favorites.
Steward's been one of my favorite cards from my very first games of Dominion. (Base and Intrigue mixed, playing with my uncle. He put in Steward instead of Chapel for my first exposure to trashing)
I've always been attracted to fun action chains, so Conspirator's a fun card for me.
I have a lot of fun in games where I go for Duchy/Duke, they can be really interesting.
I love stacking up on ~3 Upgrades and trimming my deck down to size, then turning the Upgrades themselves into Golds.
My favorite attack to use is Ghost Ship (I'm guess that makes me a mean player). I love how its power is magnified in the presence of other attacks.
The meanest deck I've ever had featuring Ghost Ship was a Double-Tactician deck where the only +Coins were Salvager and Mountebank, and well you need 4 Mountebanks to get to $8...that was a really nasty pin to lay down on someone.
Apprentice is an awesome card. When Prosperity first showed up on Isotropic about a year ago, I was super stoked to toss a Colony for the huge draw.
More recently, it saved my bacon after I had bad early draw luck and at least one misclick to really thwart my Chapel's strength, but I was able to connect my Apprentice with a Peddler and recover.
Venture is one my favorite cards from Prosperity. I really like being able to build small decks that can handle a lot of green.
Forge is probably my favorite trasher to date. My favorite is being able to build a good drawing deck before laying down a Forge on all my Estates and a bunch of Coppers, or quickly jumping to that scenario with Tactician.