This post edited to clear up confusion caused by careless and clueless use of language.
Some miracles seem to be reliable. As a missionary, I found that if people would read the Book of Mormon and pray about it, they would feel the Spirit. However, some miracles just seem to happen, and it is, perhaps, counterproductive to generalize from those miracles. Like the dear member who invited us to teach his best friend. After we had taught a lesson and given him a Book of Mormon and encouraged him to read and pray, the member told him to ignore us — all it had taken the member was a prayer, the Spirit had fallen on him like fire and the rest of the effort was excess.
The friend found that he needed to read and pray. The same difference is found in 12 step programs. Some people are instantly and miraculously changed. Most need to rely on God and work continuously on change in order to succeed in changing.
Some examples are more disquieting. As a child in Alaska I knew a Native American family who joined the church and then physically became lighter in skin tone. As a missionary, I had at least two investigators, who upon being taught the word of wisdom (which they already knew about) suddenly lost all desire and all physical craving for tobacco. As they had made many prior efforts to stop smoking, they were delighted. Almost every missionary knows that giving up tobacco is not usually that easy for investigators.
Anomalous miracles are interesting to me for several reasons. One, they are a warning that we need to be careful about how we extrapolate from personal experience. As they teach in statistics, anecdotal evidence = probably false. Second, they are so often very “tangible.” “Real” miracles, so to speak, and they often have great meaning to those who experience them, such as the dear brother my father’s home teaching companion blessed and his whole body tattoos all disappeared.
Third, they should teach us compassion for those who do not receive them. And of course, we should reflect on Boyd K. Packer’s “therefore, what?!”