I read The Mayor of Casterbridge in high school and while there is something to say about its value, it's not really my jam. Coincidentally, a high school classmate starred in a fairly loose adaptation.
The trailer oversells the movie in my opinion.
I've also read Stranger in a Strange Land, and while it's also worth reading I didn't love it either.
The Idiot is really boring. It's not in the same class as Crime and Punishment or The Brothers Karamazov.