My Amiga 500 is the only computer I use at home. I use it mainly for internet, email, games, music (mods & mp3), converting images, Mac/Atari emulation and text documents. I have used it occasionally for sending/receiving faxes, creating PDFs, 3D rendering and messaging.
I used to use it for printing documents and images, but I got sick of waiting for half an hour per page (damn Turboprint!) and stupid faulty ink cartridges.
Ami uses:
playing my classical music CDs
Hey, another Amiga user that likes classical music? I've got about 1Gb of converted (from my CDs) Bach, Vivaldi and Handel music on my Amiga.