Guitars-self xplanatory!

bass-you can feel it in your body

drums-the energy.

Christaro said:

the vibrating string, be it harp, piano, guitar, sitar, etc.

sure, wind and percussion instruments are also groovy, but i prefer the vibrating string.

that being said these days i am actually playing a synthesizer, which is electronic and not at all vibrating

Piano

Beautiful sound and easiest instrument to play.