Welcome to the world of podcasts, Spindaddy!
You've definitely started strong with Podcastle and Escape Pod (definitely check out Pseudopod if you like horror...I happen to not).
The Dunesteef runs sf/f/horror/random stories but instead of only one reader (like Podcastle) they try to have each character voiced by a different person. They also add a lot of sound effects and music in the background so that it ends up being like an audio movie. The stories typically fall between 25-45 minutes long and then the two hosts talk about whatever they feel like (usually "geek"-related, I enjoy listening but you can easily skip) for the rest of the time, so don't be scared off by the length of each episode.
The Drabblecast falls in the middle in that Norm typically does all of the reading, but he does employ music/sound effects much more than Podcastle does. These stories are typically shorter, plus he's got a number of recurring segments such as Drabblenews (news stories so weird you couldn't make them up). You should definitely check both of them out!
