Hiii!! Ooh good questions!!
Hmmm I think for Moon it might be something like Beetlejuice? He gets to go full gremlin, and it's a very villain-heavy play! Or Sweeney Todd where it's a more silent role until suddenly he gets to be a more dignified and sinister kind of villain - it surprises a lot of the people who see him act more like a gremlin to realize he has a much bigger range. Literally and metaphorically and musically sjdjd
For Sun, I think what he likes most is variety! I think ideally, he likes something that lets him show off his skills and/or the teamwork between him and Moon, so things like duets, or things where the hero will be active - be it dancing, or acrobatics/stunts : OO He likes to move!!
What they'd love to do - I think they would love to write their own plays : O Honestly, they just want to live their second chance fully, maybe the reassurance of being irreplacable? Getting to do a show OUTSIDE would be amazing for them, too! I think they could lean into the clown persona and do street performance fjdjd Did you know Cirque du Soleil started out as street performers?
As for most hated... The last play they did before decommissioned would have been Hamlet. It IS a tragedy, and then there's the curse...
For those who don't know, if you mention the name Macbeth inside of a theater NOT in the context of a rehersal, something terrible will happen. And, well, they must've talked to each other about the play a lot and couldn't leave the theater and surrounding area...
(That and the one time I did by accident, I tripped in the stairs and bruised my whole leg deeply for like a month. Ow. Break a leg, am I right??)