I think that E! comes out with a lot of good shows like the E! True Hollywood Story and tons of other things, but I am really impressed with Mysteries and Scandals.
This is the kind of show where it's hard to say you like because every episode is about a different topic or celebrity. No matter who or what the discussion is, it is always very interesting. The main reason I enjoy this show is because it's about real things/people, and it gives sort of an inside look at the topic.
Any topic can be made really good, even if you have never heard about it/them before. The show is told and set up really well about the celebrities life. (It's usually about an old tinsel town celebrity.) The research and history put into each episode is carefully pieced together in order for it to be accurate.
It seems like this show always comes on. Try to watch at least one episode of Mysteries and Scandals. It is real clever.