And if you don't really watch for what other movies *weren't* doing at the time, Citizen Kane is a really good fictional biography, but a little heavy handed, and only so well acted. Touch of Evil is probably a better fit for modern audiences.
Overrated/Underrated. Citizen Kane is pretty well rated as among the most important popular American movies and also having a lot of merit in the way that is judged for movies of its day. But that doesn't mean anyone has to like it. Or Plato (who is frequently translated to be very dry). Or the Beatles. Or what anyone puts up in any art gallery. Or Achewood. Or anything. If you disagree with a widely held critical belief, you likely place your aesthetic priorities in a different place than those critics do. Since it's all, at its root, faulty logic based on unprovable assumptions, don't worry about the taste of authorities.
And don't worry about the taste of some nerd whose area of geeking out happens to overlap in one or two places with your music collection. And don't worry when that nerd says, perhaps with even a bunch of little references and nerdy little arguments that something is SO great and nobody has heard of it and everyone should. They're really just flipping out over finding a new song they like, like anyone else, they just happen to be saying "oh I think this is so great" in music nerd talk. Probably even if they dress too alt-fancy and live in Williamsburg, Austin, or Portland.