My main instrument is the drums although I'm currently teaching myself how to play a lot of classical music on the piano. I play the drums because I like rhythm. I find that when listening to a lot of modern music I am entranced by the drums and bass more than the melody. This is one of the reasons why I am a big fan of electronic music of all types. The reason I play piano is because I'm really into musical theory and I love learning about new concepts. I also feel that all great composers are great pianist and I one day want to be a great composer.
Same story here. As long as I can remember my favourite music was anything that makes your foot tap or makes you want to move. It took me way too long to figure out I should drum. I've played a bit of bass as well and that's what find finally brought me to drumming.
I'm with you on the drums. I just started playing 5 months ago, but I find myself zoning into the beat in any song and forgetting to listen to the lyrics.