Chris G wrote:
If you're running Ubuntu on other systems then having it on servers too makes for less difference
That's my rationale, and is why I run US on several servers now, both inside the office and for hosting purposes outside the office.
Although I have Ubuntu on my main desktop, I still spend a fair bit of time at the commandline, and having the same tools (and often the same versions) on the servers just makes life easier; I don't see any compelling reason *not* to use Ubuntu Server.