At one time I'd have said a collie, they are loyal to a fault and dependable. Now that I have had an American Eskimo for several years and an Akita (that just died at age 14 1/2) those would both be on the list. My American Eskimo is by my side constantly and I couldn't have asked for a better companion as my Akita was. Loyal, dependable are great features in a machine.