I had beta tested & used Vista Ultimate for about a 19 months & was turned off by the bloat, nags & incompatibilities, eventually going back to XP. Recently I was turned on to using Windows Server 2008 Standard as a workstation. Although sharing the same Vista-based kernel & requiring a bit more manual setup to turn Server into a workstation, I found it to be blazing fast, not suffering from the annoying UAC dialog boxes & being allowed unrestricted access to the command line when using the built-in Administrator account turned on by default.
My question is, that using this strictly as a workstation, are there any valid reasons to NOT operate under the built-in Admin account? I know there is the reduced security factor when doing so in XP, but is it different w/ Server editions, especially the enhanced Vista-based kernels?