Actually, I listened to a dramatization of The Three Musketeers and I was struck by how _funny_ it is. The 4-way duel at the beginning is hilarious and Aramis' and Porthos' respective romantic escapades give great comic relief to what is otherwise an action packed adventure.
The Count of Monte Cristo is an investment, and the middle third drags, but it's necessary to set up the final third, which is so rewarding for the reader. It's the best tale of revenge and redemption I've ever read.
...I read both of the books recently and it was illuminating to be able to near-instantly explore avenues of insight/criticism of both of the books. Three Musketeers matches fairly closely to Wizard of Oz (vice versa actually), and Monte Cristo raises some really interesting questions if you view "The Count" as basically a fallen angel of divine justice (and the benefits/costs to him via that role).
Since my circle of IRL people who'd recently read both the unabridged books in the last month is infinitesimally small, it was one of my first "arms-length" test cases of "The GPT's" for fitness-for-purpose. I'm still a bit muddy on throwing a bunch of personal data and thoughts to remote servers (or becoming dependent on that interaction pattern), but digging in and analyzing old books was a great kindof gut-check and something I enjoy doing when finishing a book.
I know it's regurgitating a bunch of of reddit comments and academic books/papers (in Dumas's case), but overall- highly recommended!