I still respectfully disagree.
Do what you WANT to do, and if the USAF will buy what you're selling them, awesome.
I got a scholarship out of high school. A non-technical one. I've never liked math/engineering, etc. Did I excel at it? Yes. Enjoy it? Hell no. So I majored in Political Science, something I was sure that I would enjoy. I decided that I was not going to tailor my education and my life, that early-on, around what I thought (as an 18 year-old) the USAF wanted me to do.
The only thing that I can say to support the "tech vs. non-tech" debate is that the Air Force DOES give out more technical scholarships than non-tech. That's a fact, but I don't know the exact percentages. You could probably search the ROTC forums and find out a better answer.
If you aren't interested in scholarships at all (ie, school's paid for), then don't sweat it. When you apply for pilot, all that the selection process takes into account is your GPA. A 4.0 in Engineering is just the same as a 4.0 in Submarine Screendoor Installation. Now, a 4.0 in Engineering, coupled with you being a good little cadet might score some more points on your Commander's Ranking, but that's completely subjective and another conversation all together.
So, in short, if you are going to apply for a non-tech scholarship, you'd better have your stuff in a sock and be able to have your application stand out among the others.
Good luck.
EDIT: "2" to Tertle. He beat me to it.