My favorite is the Earthrealm. It's just got so little civilization, just little hutsd randomly spread around, and there are forests and stuff, and I just like wandering around aimlessly. Then again, it may be from searching for Fujin for hours there.
My least favorite is Chaos. I hate the spikes coming from the ground and the warpy things and the people that talk backwards. It's too damn...chaotic.

I like the Netherealm. It looks and sounds like I'm playing Doom

Earthrealm, because out of all the realms it has the coolest music.
Netherealm, because of all the demons and zombies. It just looks awesome.
Outworld, in my opinion the realm with the most stuff to do.

Id love to live in Edenia.
I love Outworld too.

I think Outworld has the coolest atmosphere. It's all purpley.
I think Chaosrealm has the best people. They all seem very friendly, and very happily suggest going out and $*#^ing things up. I like breaking stuff. Plus I totally have a crush on the girl who asks you to bring a letter to herself.
Seido is pretty, but I hate it. It all looks the same, I get lost, and the people are stiffs. However, my new favorite mini-minigame is "Lets bump into the Seidans" I love doing my part to F up their order. : )
My second favorite mini-minigame is "Zombie Punchin," which is why I enjoy Netherealm. The ambiance is also neat there.
But yeah, I love the people in Chaosrealm. They all seem very nice. Despite being totally friggin' out of their minds. (I *heart* the crazy letter girl)

Earthrealm, because it's peaceful, don't have zombies or oni running around, bright colors. I dislike the Netherealm because it's a dark place with too much red.
Edenia is also a nice place to go there, may have a few guards walking around but it's still cool.
Chaosrealm is by far my least favorite. Orangish looking sky, portals that take you around the whole place, easy to get lost in. Orderealm is kind of hard to get around to with the bridges and the random ponds in it.

Edenia or Earthrealm. I qould love to live in Edenia. Earthrealm is my realm!
At least in Orederealm, if u hate your life, there's plenty of cliffs to jump off of.