If I just had more time, I'd be working on learning how to make games, to make a Wizardry haha. I am very unsatisfied with modern blobbers. and I think it'd be pretty easy to actually make one.
Yeah, the only hard parts are having the time to do it and the ability to stay focused.
Back in 2000 when RPG Maker came out for Playstation, I was up for like 3 days working on it. Basically had the next 6 months or so off at the time being between school and finishing early, so I had all the time in the world for it. Planned an entire 7 game series with the full story/characters/abilities/world/everything sketched out over like two hundred pages of notebook paper. It just needed to be converted into game data.
Unfortunately after a couple weeks of working on it I made a mistake and saved over one of my data files. And it was the important one, the data file with the scenario data (aka what every object, switch, NPC etc did). Never got back my massive level of excitement for the project after that. I'd say the first game was about 40% done after those couple weeks, so progress was pretty quick when I just focused in on it and didn't do anything else.
Tried again a few years later with RPG Maker 2 on PS2, but that one was ridiculously obtuse. Wish I'd gotten RPG Maker 2003 or whichever the really good one for PC was. Basically handicapped myself by getting the Playstation versions because there was no keyboard support, which made entering text a total PITA and caused the writing portion of design to take ages longer than it should have. If I'd had keyboard support I might have gone ahead and re-started the project and at least finished the first of the seven games, given how much work had been done already (and was still accessible).
Regardless, even though it didn't work out for me, I can say that the rush of planning and creating a game/series is pretty amazing and definitely rewarding when you start seeing it pan out.