I have a feeling that your favouring towards Mozart, Beethoven and Tchiakovsky when you were young is because they are the "popular" composers. I was very much the same when I was young. Although I still like them I have moved towards more Baroque than any other era. Mind you some of the modern composers are now composing some very good music, such as Jenkins and Einuadi. Classical seems to be undergoing a revival, at least in the UK.