Ooh, cool topic, didn't notice it until now. Level 28 today:
Best
$7 - King's Court (63.5%)
$6 - Goons (69%)
$5 - Governor (81%), Upgrade (74%), Saboteur (69%)
$4 - Remodel (66%)
$3 - Steward (63.5%)
$2 - Embargo (64%), Pawn (63.5%), Hamlet (63.5%)
Colony/Platinum available.
Huh. I guess I'd open Governor/Hamlet on 5/2 and gain a couple golds, then buy my way into some kind of Goons engine, using Upgrades for trashing, buying lots of Hamlets for +actions, and more Governors for +Cards, then eventually try to get some big KC/Goons turns going. On 4/3, maybe open Remodel/Silver, Remodel Estates into more Silvers and Coppers into Hamlets, and buy a Goons as soon as possible, then transition into that same engine. Not really a board I see a particularly obvious play on, though.
Interestingly, quite a few of these are cards where my Effect Without is much higher than my Effect With (Governor, currently my best card with 16 games, gives me a Win Rate Without of 2.00...apparently, every time I've decided not to buy Governor so far, I've won). Colony and Platinum also have much higher Effect Without for me...I guess I'm good at figuring out when to rush Provinces on a Colony board?
As for what it says about me...I'm good with some engines and attacks, and also at not buying certain terrible cards? Don't see much of any kind of pattern there.
Worst (ignoring Archivist, which I've never played)
$7 - Expand (44%)
$6 - Nobles (45.5%)
$5 - Counting House (42%), Mandarin (42.5%), Torturer (44.5%), Inn (46%)
$4p - Golem (42%)
$4 - Noble Brigand (39%), Sea Hag (44.5%)
$3 - Fortune Teller (42%)
Open Sea Hag/Silver or Torturer/nothing, transition into Inn/Torturer engine with some Silvers and Golds. Buy Nobles instead of Golds late game (after the fourth Province gets bought, maybe?). Not confident I'd win.
From my Council Room stats, looks like there are some cards (Counting House, Mandarin, Fortune Teller) that I just have no idea how to play, so I never buy them, resulting in terrible Effect Without (since on the rare occasions when I should buy them, I don't). And then there's some cards I just suck with.
Cool beans.