I think many of you suffer from this problem. Most gamers are creative types, so we're always coming up with new ideas. Maybe it's a character concept you really want to play. Maybe it's a campaign you'd love to run. Maybe it's an adventure you'd like to develop. It could be your next awesome rule-set. But before you get to it, or just after getting started, you've already got another idea or three knocking around your brain.
I'm at that point big time right now. And since I'm actually starting to prep for my dissertation study, I really have NO TIME for any of it. But just got give you a glimpse of things you may, possibly, some day see from me in a possible future where I suddenly have oodles of time to write gaming stuff, here are some of the ideas I currently have:
Chanbara (of course, that's #1): My OSR with heavy character customization fantasy feudal Japan game. The third (or is if fourth?) draft incarnation of the rules are ready to be tested. I think they'll work better than before. I just need some time to run a few games. Well, that and flesh out the "starting area" for the campaign section of the book.
Presidents of the Apocalypse: Paul's and my take on super silly, super simple super presidential post-apoc gaming. One of these days, Paul and I will agree on a final version of the rules (or agree to make two versions). Then you, too, can be a mutated Founding Father beating the crap out of Ronald McDonald, Mikhael Gorbachev, King George III, Kim Jeong-Il, Justin Bieber, and any other foes of America you can think of, set in a ruined world of the future.
Under the Hillfort Ruins: The adventure module I wrote originally for 3E and have recently revamped for Labyrinth Lord (or whatever classic or OSR game floats your boat). A fairly standard dungeon tomb complex with lots of puzzles and traps, and plenty of loot as well. I just need to make a few edits, add some random encounters for the actual hillfort ruins above the dungeon, write up some hooks and rumors, and then this one will be ready to sell.
Demon Castle Dracula: This one's been on my mind recently, what with Halloween a week away and all. Not that it feels very Halloween-y here in Busan, where most people don't celebrate it. Anyway, this may end up being for LL or for Retro Phaze (the 8-bit OSR RPG) since it's basically the Castlevania games translated to table top. Could I get this Gothic horror-action sandbox ready for sale before next Halloween? Guess it depends on how the dissertation study goes.
Mysterious Seas: The maritime campaign I tried to run about 4 years ago or so. The idea was to mix up Jason and the Argonauts, the Odyssey, Sindbad the Sailor, Pirates of the Caribbean, The Voyage of the Dawn Treader, and the like into a big nautical sandbox. If I get around to finishing this (I really only had the first map half-way keyed, and there are nine maps), it may have to get broken into separate modules for each sector.
Ghost Castle Hasegawa: The test adventure I created for the previous version of Chanbara. I'm planning to update it to the new version when I get around to play-testing it, so eventually I'll also probably publish it. A castle cursed by its lord when it fell to his enemies, the Hasegawa family would like the curse removed so they can move back in and restore their standing at court.
Oni no Ran: The old 1E/2E Oriental Adventures campaign I ran back in Evansville in the late 90's before going to Japan was building up to a conflict between the Oni King and the PCs' daimyo. It wouldn't be too hard to convert stats to Chanbara (once I decide this draft is final or not) and release this as either a series of linked adventures, or a mega-adventure (again, if somehow time ceases to be an issue).
Of course, if I ever get any of these finished, they'll be for sale from my DrivethruRPG storefront, Hidden Treasure Books. And if I have time to write up modules and game systems, hopefully I'll have time to create more of my paper minis series.