there are a couple mormon families that live near my family. They seem alright to me. I graduated with the older son of one of the families and we were pretty good friends....
Yeah, most are all right. Just as most Catholics are all right, most Lutherans, most Baptists, most Pentecostals, etc.
Some Mormons are jerks, as are some Catholics, some Lutherans, some Baptists...
What it boils down to is pretty simple: By their fruits you will know them. If someone seeems nice, friendly, sane, helpful, and committed to family values and conservative principles, they're probably pretty good people to have as friends. Their religious beliefs doesn't matter one little bit.
I have met some very firm-believing, Bible-quoting, self-proclaimed "Christians" who acted very un-Christlike. I have known atheists and Jews who are better "Christians" than a very few of the nominal Christians I have known.