w00f
You Are a Bullmastiff
You are confident, reasonable, and very calm. Nothing shakes you up.
It's likely that you were a bit wild when you were younger, but you've gotten that out of your system.
The only time you get aggressive is when someone tries to threaten or harm you in some way.
There's a little bit of wolf underneath all that sheep's clothing!
What Breed of Dog Are You?