Life without hobbies is impossible.
One of my favorite hobbies is playing music. Having studied jazz guitar, classical and jazz harmony, I became a member of a jazz/blues/fusion trio named "Short Fuse". Back to those days, we were performing in clubs as a trio playing jazz standards and other pieces.
We recorded a live demo (more than 10 years ago!) and some pieces are the following (you might need flash player installed in your browser):
My other favorite hobby is electronics including fixing/repairing electronic devices and building tube amplifiers. Actually, my interest in electronics has started since I was 9 years old. I was trying to understand how electronic devices work. However, many years have passed until I realized that something deeper is behind which is related, of course, with Science. Still posing the following simple questions: How and why things work?