1. Argentinian Dogo ---I really, really like the one I've got. He's a great dog and if he's a representation of the breed, then these are my new favorite. I'll probably have a dogo for the rest of my life.
2. APBT--I've owned several. They were all great dogs
3. Lab---hunt trial/field trial working dog, not these short fat, couch potato things that seem so common now days. My last lab was wonderful. I've yet to find a replacement for him
4. Cane Corso--never owned one, but I know a couple that I really like
5. Blood Hound--grew up with these guys. You gotta love a blood hound on a scent. The problem is I don't have enough time to work them right now. If I would own one, I'd train it for searching.
6. Irish Wolfhound--love these guys. Was looking at getting one when I got the dogo. The only downside is I'm not a big fan of longer haired dogs.