Jane Eyre by Charlotte Bronte
I went into this one blind too, aside from being vaguely aware of a Mr. Rochester. The whole thing was incredibly fun. It's one of those books where you continually say to yourself, oh, that's why it's a classic. The book is constantly funny, comforting, comfortable to read, and engaging. In the same way as Pride and Prejudice snagged me into English society with its social criticism, I found myself enjoying the carefully placed pieces of feminism and moral critique. These barbs were my way in. It's hard for me to just accept the social norms of the period, so I need that amused and critical eye.
I enjoyed Jane Eyre so much that I intend to find more of these classics I've never touched before, to get a vague understand of them at least. This was my intention with Jane Eyre several months ago, but the damn thing dragged me in. To the public domain we go.
EDIT: Mia Wasikowska and Michael Fassbender are way too pretty to be the leads of Jane Eyre. That's just wrong.