I have seen several other posts in regards to Ubuntu 5th birthday and wanted to chime in and say Happy Birthday as well.
I have been using Linux for a long time, I think my first attempt was my sophomore year in college with some form of Red Hat. Then I ordered some Slackware CDs which came with a stuffed penguin, which I have floating around someplace.
I used Slackware, Debian, and SUSE several times before settling into Ubuntu and the Ubuntu community. Why did I choose Ubuntu? Because of the openness in the community and the way a non-coder could contribute back to the distro. The Ubuntu-Doc welcomed me with open arms as I posted bug reports in bugzilla and finally started hacking away at the docbook files themselves. Finally when Kubuntu came out I took over as maintainer of the Kubuntu-Docs, which I know co-maintain w/ Richard Johnson.
I think the greatest part about the community that has developed in Ubuntu is the openness in welcome those non-coders into the family.
Happy birhtday Ubuntu :0