I was roughly aware of them having new play styles, and the reason I was split between them was because of that fact.
When I use to play, I played very melee oriented armies, Space Wolves, Nids, and Orks, so part of me wants to start completely fresh and build an army that is the polar opposite (that being tau) and part of me wants to go back to what I am used to with Daemons.
I finally decided on Tau because I felt that a change would be nice. Thanks for the input guys you gave me a lot of info that I didn't know.
The Undefeated 13th (SW) - W 3, L 0, D 2
The Swarm (Nids) - W 33, L 14, D 0
Da Waugh Squad (Orks) - W 5, L 9, D 2
The Gunline/Gundam Wing (Tau) - Under Construction