I use MorphOS on Mac mini 1.5GHz as my main everyday computer. Mostly for internet (IBrowse, OWB, AmIRC, RemoteShell, FTP), music (AMPlifier, MusicPlayer), movies (mplayer) and digital photo handling (ShowGirls for editing, FXPaint2 for web albums). Sometimes some printing with FinalWriter, AmigaWriter or Pagestream...
A1200 gets some gaming regularly too.
