You mentioned before that you might be interested in the writing and level design aspects of game making. Since it's apparent that programming probably isn't for you and you can't really draw or do the visual art side of things (don't feel bad since neither can I), I'd avoid any game design program that requires you to do either. In fact, you may want to simply go for a program geared specifically towards writing or literature for the writing aspect of it. Lessons learned in writing in general could be transferred over to writing for a game, and projects that you work on during the course work could make for a good portfolio to show to potential employers.

As for level design, try your hand at it in a variety of game types. You mentioned using the LBP level creator a lot which would be good practice since making a level that's fun pretty much requires you to not only understand the core gameplay for the game, but get your head around concepts like pacing, and how to structure challenges in game. It may not seem like that would transfer to something like an FPS, but once you understand what makes a level exciting, all it takes is learning the mechanics of a given game to transfer that knowledge and experience over. I would definitely start messing around with the level editor for a game you play and perhaps get involved with online mapping communities for said game. Then you could make levels, share them, and get feedback relating to what could be improved, balance issues, etc. thereby helping you improve.

Get enough experience with these and you may even be able to work your way into assisting on some indie title. Don't think that you necessarily have to go with some specific course targeted at game design, or that you have to learn something you hate to get in. There are a number of ways into the industry for those who have the drive and the passion to learn and improve in their areas of concentration, even if it's done without some sort of game design certificate.