Bit of Trekkie? Got three hours to spare? Then how about watching this interview with Rick Berman, one of the exec producers of ST:TNG, ST:DS9, ST:Voyager, ST:Enterprise and all the TNG movies.
In it, he gives a relatively no-holds-barred discussion of all the various things that happened on the shows, what he thinks were the high and low points, why various casting decisions were made and let’s slip that he spent most of the time begging Paramount to let Trek rest for a while to stop people getting bored of it.
If you want a list of the highlights, you can read them over at TrekWeb.