No question for me....Border Collie. My current BC is now 10 and I hope he lives for a long time. Smartest dog I have ever owned and I have owned several breeds over the past 65 years. He was easy to train, has good manners, is very loyal and goes with me everywhere. He hunts pheasant, herds cattle, loves the Frisbee, reads my mind, don�t raise your voice around my wife or he'll get really irritated and definitely don't lay a hand on her!