I will admit, however, I also like to read widely on a lot of different subjects and enjoy good fiction also. I do think that, in part, it is the regular reading of the scriptures, including the Book of Mormon, that allows the Spirit of the Lord to communicate with my mind so that I can better understand life, meaning, and purpose.
I think that if you have such experiences as communication with the Spirit of the Lord, and if you believe that this happens due to reading the scriptures, that you will need little external motivation to read.
Consider drug addiction for a moment. It is far more likely that shooting heroin results in attending the shooting alley than hanging out at the shooting alley results in doing heroin. There aren't cases of folks hanging out at the shooting alley who forget to do heroin for an entire year and must commit to it in order to get back in the habit.
It's far more likely that reading the Book of Mormon regularly is a result of actively attending church, it's not the other way around. Reading the Book of Mormon is most likely a causal dead end, it leads to no other interesting behaviors, it simply correlates with obedience in general. You don't become obedient because you read the Book of Mormon, you read the Book of Mormon because you are obedient. Church leaders take Book of Mormon reading as an obedience marker, but they preach it as a causal factor to obedience, which it is not. It's a stunning and important contradiction.
Your example of the Spirit of the Lord expanding the mind like the spice Melange after reading the Book of Mormon, if true, would result in the Church simply handing people Books of Mormon in order to get the effect of spiritual awakening that leads to tithing and church attendance. They would not need to plead with people to read it. You would not struggle to get through five minutes a day if this communication effect was so pronounced.
Lost Gospel of Thomas 1:8 - And Jesus said, "what about the Pharisees? They did it too! Wherefore, we shall do it even more!"