we have a pyrenees mastiff (male), who is huge, but very friendly and not the kind who enjoys being on his own. we also shave a spanish mastiff bitch, who is more alert and reserved, but not very quick moving. I've heard anatolian can be difficult to manage. in the past we had some pastori maremmani abruzzesi (which is an ancient breed of shepherd dogs in italy) and they were great guard dogs, very intelligent and independent, very strong, and beautiful as well. but some of them (the son, in our case) can be real devils. if you get the right personality though, I think they are fantastic.