Getting my feet wet

I'm going to college for Computer Science. I AP tested out of Intro to Comp Sci 1 (covering Java) in High School, and am teaching myself HTML. I also have a Headfirst Java book that I've been reading so that I can *really* know Java like the back of my hand.

I was wondering if any professional programmers/software engineers could give me some tips as to what I should go for. My plan is to learn as many languages as time permits, there's just not enough hours for learning after working 10 hours a day (though I can learn at work, it's part of my "job").

I didn't like my experience with C++ but I didn't give it my all to learn it, so it's probably not as bad as I think.

I'm learning HTML5/CSS because HTML5 is supposed to become the standard in 2014(I think?) and I might as well get ahead of the curve. And HTML5 is just....great.

I was thinking Objective C or C# as my next venture as those were the 2 languages I've heard are used the most in "real life".

Just to be clear, I have *no* interest in coding games. I know it sounds boring, but I'd want to implement code for Boeing, a gas/oil company or perhaps even a large insurance company.

Thanks in advance!