It is my main computer (though have a Macbook, but thats for moving about).
General use comprises of web, email, work, parallels, Neooffice, iTunes stuff.
Photography use: Lightroom and Photoshop CS3, mini struggles a bit on lightroom though.
Also it's running as an Apache webserver and runs MySQL for my blog.
MacMini 1.66 1gb 80gb hdd. Use an external firewire Raid for my photography.
Very happy with my first Mac. Just hoping to get a more powerful replacement soon. I much prefer a separate box to the iMac (I use my monitor for other things!). So if the Mini is to die, then I'd like a screenless iMac please, either that or a cheaper MacPro, called the MacNotSoProJustCutDownABit