You may be barking up the wrong tree with that post, protos; the contributors to this thread (myself included) all like listening to classical music...
That being said, I can understand you listening to Ravel and Debussy instead of others as they are the composers who have written my fave music. But I do listen to many other works, as seen in this thread. Also, I don`t listen exclusively to classical.
One can`t force anyone to like a certain kind of music, as you have learned. The kids might not be interested in Mozart right now, but one never knows. Although people who like classical are a minority anyway.
I think Schubert songs in particular, (and maybe opera) take some getting used to- the singing style involved is quite developed.
This may sound harsh, but I think people don`t want to have to put much effort into listening these days. And classical music requires concentration in order to be fully appreciated. So that may explain why other music is more 'listenable.' I love lots of different music, but I readily admit that it takes more smarts to listen and understand classical music (not all, of course) than other kinds...