| subtle quality will out shine in your face "effects" every time |
I have to agree here.
Most people I know, including may network administrators and desktop support techs would go for the subtle upgrades for large networks of work stations.
I don't think that customizing will hit full stride until work places are using some of the things we all know about (and use) already. The "subtle quality" graphics that are enjoyable, yet do not distract the user from the use of the work tool (computer) would be the grain that tips the balance in favor of customization on a seriously large scale - IMHO.
I am a bit conservative though, so I tend to fall back to a well built skin for the shell, a dock or two, and a full set of custom icons.