Mormons are a very close knit bunch. For example, when I have moved into a new ward (congregation), it's like I already have friends and/or family there. Most Mormons feel that way about each other and this breeds a strong loyalty to our own. So, for many, Mitt's like family.
Personally speaking, I am loyal to Mitt because I am LDS and I grew up in MA. So, I have known him and his family for most of my life. I worked on his campaign in '94 as a volunteer and briefly as a staffer. He is someone I have looked up to for a very long time both personally and in my business conduct. He is one of the most intelligent, honest, decent and compassionate people I have ever known. I truly believe he would make an excellent President of the United States.
You are fortunate that you got to know him personally, and that this experience only strengthened your support for Romney's candidacy. : )