Hmm, not sure really. Just like you, I want to do something in design, in fact, I love designing stuff. I love digital Art, along with 3D Art, and I even love 3D modelling. I've done 3D modelling in my Resistant Materials class, and although I hate the subject, the only part I liked was the 3D modelling. I created CD racks, along with computer desks, chairs, and even once I tried to create my own house, until I realized that I would need the full measurements of my house, but I found that It would take quite some time to find the measurements. So I gave up on it for the time being. I do tend to enjoy digital art, it's fun, and in fact, you can create so much great stuff from it. Since I have nice decent skills in drawing and along with great knowledge on Photoshop, I could create anything that I want to, but all it requires is time, which currently I'm lacking in.
Game design though is a great subject to do, that is if you're dedicated to it. I'm not sure whether I'm fully into it, but I do enjoy playing computer games. And seeing all these great games, it just makes you want to make of them yourself, but really, it would take time. Now I feel unsure about game design. I do like it, and I've studied quite alot of things from it, but one thing I do feel confident about is graphics and web design, I have created alot of cool stuff, but for now, I'm unsure on what to do.
I'm thinking rather than be specialized in just one subject, I'd learn more fields in IT and design, and I think that would be much help to me. I don't really want to be learning just one thing, I'd prefer to learn more things in that subject, cause there is quite a bit. Just means that I've gotta spend more time learning it really. I think where I am at the moment seems to be reasoning with that.
Probably when I head to Uni, I'll probably decide on what I want to do really, I mean I could just learn 1 thing, or alot of things. It's just a hard thing to decide. For now though, I'm just going to continue developing my knowledge and understanding in both ICT and graphics. Hopefully something good will happen.
Thomas, you should go and talk with your careers advisor, mine helped me out alot. Obviously at some stage, if you can't achieve that goal, your advisor will ask you what alternative career you'd like, it's happened to me, and I said anything code related e.g. Web design, software dev & des. Obviously I have some great knowledge in both coding and design, so that could be an alternative for me if I don't get into Game Development.
So yeah, good luck and hopefully you'll find something you'll like.