Warhammer

[Morg]

Warhammer 40k
Evil - Main ones
Necrons
Tynanids
Orks
Chaos space marines - worst of all
Dark elder

Good - Main ones
Elder
Space marines - Oposite to Chaos - Lots of chapters
Tau - neutral/own empire
Space wolves
Imperial Guard
Daemon hunters
Witch hunters

Warhammer fantasy
Evil
Beasts of Chaos
Chaos
Orks
Dark elves
Scaven
Tomb kings
Vampires

Good
Bretonia
Dwarfs
Empire
High elves
Wood elves

Self - For no one or for hire
Ogre kingdoms
Lizardmen
Dogs of war

edited abit for correctness
Warhammer 40k
Evil - Main ones (order of most evil)
Dark eldar
Chaos space marines
Orks
tyranids


Good - Main ones
Eldar - Neutral but opinionated enough to be good
Space marines - Oposite to Chaos - Lots of chapters
Space wolves
Dark angel
Blood angels
Black templar
Imperial Guard
Daemon hunters
Witch hunters

Neutral
Tau
Necrons

Warhammer fantasy
Evil
Beasts of Chaos
Chaos
Orks
Dark elves
Scaven
Tomb kings
Vampires

Good
Bretonia
Dwarfs
Empire
High elves
Lizardmen

Self - For no one or for hire
Ogre kingdoms
Wood elves
Dogs of war


EDIT:
i have played alot of 40k armies and a few Fantasy armies.
Azrael, I am long in the tooth *hint hint* i love space wolves. Although my army is more blood claw orientated. hehe
although i hate GW fanboi's i think you should go Space marines for your first army because it is very Cost effective and easy to paint. although you can go for what ever army, my personal favorite armies are High elves and Eldar. High elves are very roman like and Eldar are a "Combined arms" army so each unit/group has to do its job for victory instead of maybe only CC do their job for the win.
i suggest http://uk.games-workshop.com/default.aspx for a look before you choose. look around abit have a look for what you like, if you want a fun and helpful Forum that you can talk about Warhammer in for advice withpainting and modeling and such go to www.librarium-online.com its a very friendly forum.

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"True Sentience is made through love and care for those lesser then your own" ~ By Tao'Shen khour