Ah, I don't have to decide quite yet... got a year or so of grace. I'm not sure if I'm communicating this right... you don't go to grad school to learn to code. But if you're in CS, you'd better be able to, or convince someone else to do it for you. It's like if I want to be a writer, I don't study grammar or spelling, I should know that already. What I need to learn is how to translate ideas into something more concrete.
It's going to be either AI or systems, and I'll know in a year. Maybe in six months. But I have to be slightly proficient in two areas, anyway, so I'll learn both and then pick one.
Roger that... just so ya' understand... college isn't about learning things. It's about learning that there is a great deal that you don't know, and will never know.
If you need confirmation of this, just hang out in a good ol' fashioned blue collar bar for a bit.