Puppy Linux is another good one, but it's quite different and finding help when it's needed is a bit of a problem.
I don't know if you know this already, but you can try out any number of distros non-destructively. Just write a downloaded image distro to a pen drive, boot off it and select "try without installing"[1]. This is how I tried out a number of distros and settled on Lubuntu.
[1]: https://help.ubuntu.com/community/Lubuntu/InstallingLubuntu