Someone at the Ramble board said (sorry, forget who) that Northanger Abbey board wasn't that popular as P&P. It's almost a fact that people like P&P more than NA (though I'm sure there lot of exceptions, especially here (so maybe I'd better shut my mouth)). But I think that NA isn't that much read because we live in another time. I mean, at the time JA wrote NA, horror and gothic books were very popular. JA, ironic and critizising as she was, wanted to react on that and wrote her own parody on horror stories. I think we cannot fully understand the book because we don't know or don't fully realize how people were and thought in that period, if you know what I'm sayin'.

Other than P&P, which always occured to me to be a sparklin love story of all times, NA has a more darker, more Bronte kinda atmosphere.