Threads on the rec.radio.shortwave newsgroup, when they are on-topic, mostly fall into a small number of categories. Common threads are:
* which radio should someone buy
* how can someone improve reception or reduce interference
* did anyone hear [weird thing] on [random broadcast]
* how is [weird new technology] going to affect our hobby
Today, a poster named Terry started this thread about hearing and audio quality and its relation to the radio hobby. His posting is atypical and detailed, and I recommend taking a look. The link goes to radiobanter.com which provides a moderated interface to several radio newsgroups.