These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Genius Bonus: Or rather Reader Bonus. Luke Evans (Aramis) bears a resemblance to Orlando Bloom (the Duke of Buckingham). In the book, when D'Artagnan first sees the Duke he notes his resemblance to Aramis.
Germans Love David Hasselhoff: The movie was a flop in the US but has been quite successful overseas (even managing to be of the year's biggest films in Germany and Japan).
So Okay, It's Average: The splendid visuals and some solid performances and action scenes are undercut by the rest of the film.
Tainted by the Preview: People were sceptical if this film was going to be any good with the previews... especially with the airship.