Since I got a month of Netflix for free I'm watching the rest of Mystery Incorporated, which is still just as fun as the first 12 episodes. I'm about 18 episodes in now, and I'm looking forward to the rest of the series. I'm quite surprised that I would say that about a Scooby show, aside from that very first season.
I had forgotten how many clones of that original series there were- and not just by Hanna-Barbera. I could count at least seven right off the top of my head. I don't think any lasted longer than a season, except for Josie and the Pussycats, and they got sent into space so as not to show up Scooby and the Gang.