Altair..he has what it takes to be an Assassin..he's dedicated to the creed he just acts like a professional assassin, doesn't talk too much, he knows how to remain hidden from templars, he kills silently a cold blood killer,moving to the next point.. I'd be a dumbass if I said that I didn't like Ezio too he's just awesome got the skills the personality especially in Revelations he really shows what does it mean to be a Mentor (Mualim), Connor I liked his story, his childhood and the most thing I liked in him is the pride of being a mohawk red indian with so much caring about his people when he said "My people come first", his tomhawk, his way of fighting, him leading an army, him becoming a captain, the patient and brave kind of person he is, the hard times he went through..his mother's death, forcing himself to kill his own friend, having no choice but killing his dad and actually I'm so willing to see Connor in next AC games I liked him so much...but my choice would go for their grandmaster Altair ofcourse he's like the only one that seemed to know what exactly what he's doing without any regrets, blindly serving the creed cause he knows he's doing the right thing.