Most excited to use would be
Recover Stolen Material for the mentioned combo with
HQ: Return Orb to Bajor and particularly
Orb of Wisdom. Bought the Orb stuff back in 2008 wanting a custom play engine for "unsupported" builds, so I am INVESTED. (I believe the
Bajoran Raider was also involved, hah.) The batch seeding rules for my preferred format put a damper on that, though there have been some nice play engines since then.
Also I'd be surprised if the CC had in mind a particular deck-building hobby: intentionally not wanting much movement in my collection, so sticking mostly to traditional cards, but also wanting to eat my cake, with virtual cards that seed on table or thereabouts, as well as dilemmas. That makes for some wack builds. It also makes enablers that let an existing collection be put together in new ways treasure!
Least excited to use... having to pick something,
High Ground? My Dominion decks seem drawn as usual to
Subjugate Planet on
Diplomatic Conference. I'm sure High Ground can set up something disagreeable, it's just that I will do it myself with questionable and exciting all-in attempts. Parliament really has the best conferences.