It's a shame the HP calculators never caught on in schools. My high school actually had a full set of HP48SX calculators that I got my entire class to use in 9th grade. We even had a projector you could plug into the calculator to display things to the rest of the class. This helped a bit, as several students then bought a HP48G series.

Everything seems centered around TI though (and I can't stand to use them). I got way to used to having RPN and easy stack manipulation at an early age, and it has stuck as an expectation. I have problems with calculators built into Windows/Mac OS for anything more then some quick math.

My sister now has my HP48GX for her high school math classes, and seems to be doing well with it. I'll probably buy her something comparable, so I can get my 48GX back.