I use my AROS systems everyday, and aside from having to use Windows at work it's the only system I use. Uses are for work (PageStream and FinalCalc via Janus along with Ghostscript and NoWinEd native), email (YAM), web browsing (OWB), playing music/videos (mplayer), graphics maipulation (ZuneView/ZumePaint & various 68k applications too), coding (Hollywood, quite often for work applications via a recompile for Windows) and occasionally playing games.
Oh, and currently we have an A1200 motherboard running 24/7 controlling our central heating and hot water systems, soon to be retired from that role (and possibly gaining a Vampire at some point) to be replaced by an AROS box with which to do additional home automation tasks (controlling lights etc.) and to act as a media server.
Cheers,
Nigel.