I’ve used Linux for around 5 years. I’ve seen quite a few changes since Ubuntu’s start up (Warty Warthog, I believe).
I used Ubuntu for around 2 years, moving onto Gentoo for around 2 years, and I’ve been using Arch for around a year now (along side Ubuntu on my desktop). My initial move to Gentoo was to learn the in’s and out’s, configuring everything myself and compiling my own custom kernel, tweaking all sorts of things. I ended up going full circle though, wanting something more basic, requiring less maintenance. Arch has been good to me in that regard, allowing some practical customization, but being more or less hassle-free in updating.
I’ve been impressed with the latest Ubuntu 10.04 as well. Nice and simple to get everything setup and everything worked. Sometimes Ubuntu jumps the gun on new software and creates a bit of a mess for those who have obscure hardware (PulseAudio, Grub 2, etc), but no issues this time around.
I also tried Fedora 13 on this desktop and was excited to give a RPM based distro a go (since I haven’t used one in spite of how common they are), but I had all sorts of trouble getting the nvidia driver to install, with no official documentation to go by and only a recommendation to pick another video card… So, after breaking X trying to install it on my own, I defaulted back to Ubuntu. (Just to note, the process of installing official nvidia drivers is incredibly simple even in Gentoo, which is known for making everything hard.) Oh well. Ubuntu has been nice.