I feel very fortunate that all of my in-laws (theres quite a few, his parents are divorced but both remarried) are normal, for the most part. The ones that are a bit odd at least know how to stay out of our business. All ya'll with terrible MIL's really have kind of inspired me to get closer with mine, she's really a very great lady.
Oh, and for the sake of my husband, I hope I don't turn into my mother, she's wonderful and I love her to death, but living 1500 miles away from her has really helped our relationship, to say the least.