Never thought I'd be posting in this thread, but at work my main workstation is a PowerMac G5 and it will be for 4 more weeks as of Monday. I'll be winning a bet with another one of the Mac techs where I work. The basic outline of the bet is that our main workstation must be a PowerPC based Mac and we must use it for 5 weeks. He chose a Quad G5, with cooling problems. Last at my work place. I chose a 2.0 June 2004 G5, with no known problems.
First day of the bet, he put some Ubuntu distro on his. Mine's still running my highly customized installation Leopard. But I'm slightly cheating with Microsoft's RDP and the virtual servers in the Win 2008 R2 rack. Don't tell him.
Even at my house I've been spending lots of my free time in my workshop, which only has PowerPC Macs. My current project, get Tiger running nicely on a Power Macintosh 8600.