Look for s mmorpg with unique classes. (Mounts are a plus)

Zaykai

I'm starter to get tired of the usual fighter, mage, priest, etc.

While looking around at some games, I noticed Silkroad had a merchant class, and i'm curious about other games that have unique classes.

Also, mounts are a plus x3

1. 2D or 3D

2. Must be FREE

3. I don't mind thief or rogue classes either.