If it were just a social club that promoted family values, high moral character, hard work, and a healthy lifestyle I would be a member in a second. In that sense, I respect Mormons very much. IMO, that is what appeals to most.
What turns me off is the corporate nature of the church heirarchy that most don't realize, the suppression of evidence to anything contrary to stated doctrine, and a white washing of the real history of the church. The social pressure to state Joseph Smith was a prophet once a month in front of the congregation. The whole thing is very cultish. I have no ill will towards the members, the leadership is what I have issue with. At that point, most of them know the basics of how it all went down in the beginning is total BS.
Anybody with an open mind and a middling of intelligence can research enough in a single day to come to the crashing realization many of the fundamental beliefs of JS, the BoM, and general history of polygamy is absurd to the point of being almost laughable. Most just don't want to.