First option I'd go for is graphic novel. In that it's the easiest to do, you just need InDesign and Photoshop, and maybe a Wacom tablet.

Logistics aside, next option I'd go for would be MMO style games. I've developed small games using tools like gamefroot and Flash, but I'd love to build a hugely immersive sandbox type world. It probably wouldn't be medieval, but instead... surreal, strange. Subversive, gender inversion, challenging stereotypes, visual journeys, flights of fancies, sensory exploration, paintings come to life, dancing on words. Sadly, I lack the programming skills.

As for lacking the programming skills, I know there are all sorts of resources online, online classes, I've done web coding, database architecture, XML stuff and so forth. I COULD do it, it's more a matter of it's harder. Much like, english and art and writing and foreign languages were stupidly easy in high school, while math, though I got As and Bs, I had to struggle with.

As for the graphic novel: I have the skills. I have the ideas. I have years of notes where I've kept track of graphic novel ideas. I have experience with fine art, illustration, prepress, print design, creative writing, and so forth. The problem is of an ADHD nature. Mind wants to do so much, very hard to pick one thing and stick with it. I tend to need a support structure to help me stick with something, like working on a project with a group of people, taking a class, and those things are currently difficult to find.