Ask HN: Why did you choose Ubuntu?

We chose RedHat Enterprise Linux 5.3 for our development server because it is cost effective (cheap) and is supported by RedHat plus it is a supported operating system for our Dell server. It also has stable RPM’s, errata, ect.

Since a lot of you use UBUNTU I was wondering, why you chose to go with UBUNTU. What particular features appealed to you to make you choose this particular Operating System?

What was your thought process behind the selection, and are you happy with it?