My favorite dog is the boxer, I had 2 pure white ones when I was growing up, they were awesome. Great family dogs, and guard dogs. Most of my dads friends wouldn't come in the house unless they knew our dog was restrained or locked in 'his room' LOL. He never bit anyone he was just massive and intimidating. (both deceased now)
Second would have to be a Rottie, I had one of those too, loved her. Her only flaw was she would kill anything that got in her chain length, she was our outside guard dog, and a **** good one. She was great with the horses too!! (she too is deceased)
Third has to be the Pitt, I own one now, and she's fantastic. She's an excellent guard dog, and wonderful dog just to be around, considering her past circumstances. I love her to pieces!!! I even taught her to help me herd cattle!! And she's gentle about it. I hate the breed slander around here, in a few states here in the US your not allowed to own a pitt, its sad. Judge the deed, not the breed!!! Its the people who ruin them.
My mom found a stray chow and took him in, he was good for about 3 weeks and one day we decided to go riding and he attacked my moms horse, ripped her face open from just below her eye to her lip, and bit her in the belly. My mom stitched her up and called the vet. Then I went up to feed the herd and he followed me and attacked a paint I was caring for, he just got his nose, and I treated him and chased the dog back down to the house. We found someone to take him the next day. He was loyal, but we couldn't trust him around the horses or other peoples animals.
Another personal fave is the husky, my husband would love to get another one.