I really want to get into an online RPG besides World of Warcraft (Never played it, never want to)

Any suggestions?

I want a game with tough boss's and huge areas to explere etc etc.

Anarchy Online - The original download is free, and you only need to pay monthly if you decide to get the expansion packs.

What is Anarchy Online?
Anarchy Online (AO) is a science fiction themed massive multiplayer online roleplaying game (MMORPG). The first three expansion packs, Notum Wars, Shadowlands and Alien Invasion, have received high praise and won 20 international awards.

Features -

Enjoy unparalleled character customization, including 80 character skills, hundreds of special attacks, thousands of items and a wide range of clothes, weapons and armour. No other online game delivers more character customization and depth.

Explore an epic and believable sci-fi universe with an involving and deep backstory

Experience fast-paced gameplay with more action and intensity and less camping.

Choose your playing style and select one of 14 different professions. Soldier, special agent, pet profession, healer, technological expert, trader or adventurer... you choose.

Go solo or join groups and guilds, AO is packed with fun content for everyone

Instanced dungeon areas mixed with a wide range of static dungeons and quests means that there is always something to do, even for that half hour session.

Express yourself through voice, emotes or chat in a fantastic social environment with clubs, bars, guild houses, player apartments, social clothes and much more.

Fight thousands of exciting monsters in a fantastic player versus environment gameworld, or challenge human opponents to conquer land in large PvP areas.

Immerse yourself in a world with a fantastic musical score and unique art direction.

Enter AO more easily with dedicated beginner areas and live in-game assistance

Travel in style with futuristic flying vehicles available to all professions, and access all areas efficiently and fast.

Superior in-game Customer Service including a greeter to help ease your first few steps on Rubi-Ka.

Join a friendly, large and established player community.

Cool looks like you can play Shadowbane for free now too...

http://chronicle.ubi.com/newspost.php?id=15088

edit: and apparently it's been free for over a year now... well it's news to me.

Puzzle Pirates

THE BEST WEBSITE FOR MMOs

www.gameogre.com/

I liked Space Cowboys Online, because I get to fly around on futuristic fighters and participate in nation wars and raids onto enemy territory. And neither wars nor raids are events or anything like that, you just get enough of your clan members or friends or some random people and fly to enemy territory and kill some newbies. The biggest problem with that game is that grind associated with higher levels. The game has been out for 2 years and nobody has achieved max level and there are people that played the game since beta.

I hear GuildWars is popular and a very good game with a strong focus on PvP.  It's not free but fairly cheap.  If you buy a package, no monthly fee. 

http://www.guildwars.com/products/guildwars/


Also, there is a game called Mythos; not sure if this is MMO or MO.  A bunch of developers of Diablo II quit Blizzard and have been making this title.  In this sense, this is Diablo III.  It's in a beta stage now.

This is basically a free game, but you pay for items if you want.  But you can also get those items without paying if you complete quests etc.
 
MYTHOS Screenshots:

ALPHA Build

BETA Build
 

Mythos Trailer
http://file.4gamer.net/movie/mythos.zip

Gameplay footage
http://dungeonrun.com/2007/07/26/mythos-beta-gameplay-video/

Official Site
http://www.mythos.com/

Unofficial Site
http://mythos.incgamers.com/

A lot of screenshots and movies
http://hellgate.incgamers.com/gallery/showgallery.php?cat=526

I may be the only one, but I'll say Runescape. Once I got bored of the PS2, I started playing. I was hooked for around 3 years. It has a lot to offer, and I had some friends who played as well. While I did not give it up all together, my time is now split with that and the Wii, since it got me back into console gaming.

Yeah. Guild Wars is also good. I played the first one for a few months, but my friends never caught on. I'd say that, for your interests, Guild Wars is a very good. You pay $50 for the game, but no monthly fee. Its a very good value.

Runescape is ok if you actually pay the fee which is correct me if I'm wrong like less than 5 bucks but I would say you should check out Silkroad Online or Kal online which have huge korean bases and there acouple of others I just can't remember the names and I'll post them when I figure it out.