I did something I've never done before in September: I kicked off someone else's campaign. Ok, technically it's still my campaign, but material belongs to Pazio. The campaign is the Second Darkness adventure path, and if all goes according to plan, it will see our seven freshly-minted heroes face the ancient hidden evil of the drow in an attempt to save the world from a second apocalypse.
I've been running my own campaigns -- for D&D, Star Wars, and Savage Worlds -- for 15 years. Over that time I've made liberal use of material from a variety of source books, including more than a few one-shot adventures, but by and large I was the one writing each week's episode. It was fun ... but it was also tremendously time consuming.
When the time game to launch a new campaign, Paizo's Pathfinder Role-Playing Game was an obvious choice. It preserved the strain of Dungeons & Dragons that my gaming group preferred, and enhanced it just enough to get rid of the things that had been driving us crazy in the 3.x branch. But the challenge with Pathfinder is that it's a crunchy, rules heavy game. When we ran Star Wars, I could easily knock out non-player characters in a night, but going with Pathfinder meant a return to magic and all its inherent complexity.