etextbooks were rarely available for my course of study, and I was too lazy to self-digitize, but weight was a huge advantage for me during school anyway. I always had to have books (more than one, for variety's) with me for various times when I was inevitably waiting for something, and before ereading, the weight and bulk were killing me. Getting my entire personal library on a tiny chip, and never having to choose which books to carry and which not to was a huge deal for me.
I hope you have better luck with selection though. And welcome to mobileread.