What I'm looking for is this. I would like to find something that has many classes to choose from. Lots of customization for your character. I hate games where everyone looks the same. The ability to build houses, towns, or castles. And if you can have pets or something to ride on. It has to be f2p. I've played Conquer for the last 7 months and it sucks now. BORING!!! Is there anything out there like this? I've downloaded Shadowbane but it looks like its dead from what the threads are saying. Also I've looked at Last Chaos. Are either of these good? Oh, it has to be 3d and not to cartoony. Thanks in advance.

I think Shadowbane does seem like it fits your description, even if it is somewhat dead you might as well give it a try, I'm sure even if the players are few they should be pretty dedicated.

I think another game you could try would be Wurm Online. I personally haven't tried it but from what I've read about it, the graphics are fairly weak but it's very community oriented and flexible. I think you can build stuff in that game such that the world is always changing.

And as for Last Chaos, it's a pretty normal grind MMORPG and it lacks in the customization department. So while I may consider it pretty good for a free MMORPG, you may not like it.

I'd definatly reccomend Hero Online. I only played to about lvl 30, but it was pretty fun while I did. It has the pets, which you can ride and fight with, although there isn't much customization for characters, and it gets pretty difficult to lvl early on. But if you like a challenge, you should try that out.
Also, RYL is fun too. There's decent customization, and a lot of items, but sadly, no pets.