Auril was the worst god of Justice ever. However, he makes the best God of Trickery. Its about what you role-play best. However, since I don't know you very well as of now, I can't tell you which would be best for you.
A decent way would pick an alignment that represents you, and then a choose a god with that (or very close) alignment.
Lawful Good - Righteous, evil must be destroyed
Neutral Good - Good in its true sense, just a good guy
Chaotic Good - Robin Hood-type guy, the best kinda good for the people
Lawful Neutral - The Judge, your decision is final
True Neutral - Undecided, you can go both ways at your whim
Chaotic Neutral - The Rebel, like Chase
Lawful Evil - Eternal Destruction, not only evil but smart
Neutral Evil - Evil, just plain Evil
Chaotic Evil - Evil in a sense you just can't understand
Edit: "the dwarves need some love man" - Mask
True dat.