it is so much harder for me to play passionately on plastic, unweighted keys on a keyboard. it doesn't have nearly the same reactivity as my piano that i came to know and love growing up. but mark my words, someday i will have a nice digital piano that feels like a real piano, and the game will forever be changed  and don't get me wrong, i can make the real plasticy keyboard sound good, but i just have less fun playing it some reason. and i want to have as much fun as possible
it's interesting to me that most players prefer weighted keys. i strongly prefer unweighted keys. can play much faster, and you can do a gliss without needing medical attention afterwards. also if you ever want to carry the thing anywhere.....