Absolutely avoid overpriced aviation universities. If your a freshman in HS and working on your PPL, you are way ahead of the game. Get your instrument rating next and take it from there. I would think about other backgrounds besides flying when it comes to college. It is nice to have a field that is unrelated to flying --- you may need it! Plus it rounds you out as a person, not to mention a vastly improved social scene that you will not find at Riddle.