Here's an awesome MMORPG.
It's like MU online, except it's shitloads better.
you can mount on various animals and stuff.
and it's FREE.
And you don't have to worry about little pre-pubescent children insulting you for being 1 level lower than them (*cough* Runescape).
You can get it at:
http://www.supremedestiny.com.my/