Difficult to generalize like this, but I'd guess Renaissance, or maybe Modern. I think the Classics would be a bit too put off by all of Shakespeare's crass humor and dick jokes XD I can see Merida absolutely loving his comedies.

It really depends - I think Cinderella, Belle, Ariel (it's new to her) & Rapunzel would enjoy his overall work the most and they're from each group. Possibly Aurora, I can see her liking A Midsummer Night's Dream.