TLC doesn't have any credibility. Both it, and the Discovery Channel, for instance, spend most of their time now showing home improvement shows. I remember when they used to show actual science programs. Ah, those were the days...hey, even TechTV isn't technical most of the time. It's all dumbed down considerably.

I ran into an article in Scientific American a while back on CSN - CableScienceNetwork which would be modeled after C-SPAN. Anyhow figured that with your disgust at what those two channels have become you might be interested in something of the CSN nature, which IMHO would be awesome to see come to fruition.