How: I started on violin and then added the cello. To date, I sadly admit that I feel that the cello is the most beautiful souding instrument in the world. I was actually getting good on them, and my first piano teacher was terrible. Then I started with another piano teacher when I was about 13. She scared me. I started practicing piano only, and got serious about it in high school. That pretty much explains it.
Why: A few years back, I was even considering switching back to the cello, but really, it's a bit late for that. Anyway, the piano has by far the greatest literature written for it, with an inexhaustable supply of repertoire. Also, the piano is very fulfilling to practice alone without accompaniment. I've become quite used to the idea that I am going to play the piano for the rest of my life, and I'm happy with it. True, the cello has quite a soul, but there is a clean purity and great breadth of diversity in the piano sound. And as a pianist, there is so much one can do with chamber music, lieder, and instrumental sonatas.
I guess the basic answer is that I just love to play. Practice can be very exhausting (especially good practice) but it all pays off when one can play a Chopin ballade, a Mozart sonata, Schumann, Schubert, Ravel, Rachmaninoff.......
Anyone else?
David