It seems as though unpredictability is typically the unwelcome guest. It seems to squelch our plans, and we wish that things were more "stable." In other words, we wish we could control things.
Take a few steps back, and look at the big picture. Not just a few steps--but enough to where you're getting to see the grand scope of things.
Predictability ruins the surprise. It takes away the moments that make your heart skip a beat and drastically reduces the amount of times when it just seems like God's orchestration takes your breath away. The words "wow," "whoa," and phrases like "I would have never guessed!!" or "You've got to be kidding me (in the positive sense, of course)" would cease to exist, and our lives would be blanketed by monotony, drab and dull.
Monotony negates the necessity for courage, for trust and for faith. The truth is, those things are the very things that make our existence rich. Monotony takes away from what God wants to give us. Sure, its easier to "hold on to," but the reality is that when monotony (or at least the desire to know every step of the way) gets a hold of us, we we lose ourselves. On the radically opposite end of the continuum, we have the option to let Him lay hold of us--therein lies the adventure of stepping into the fullness He has invited us into.
So in some off-beat. pragmatic sense, the prayers is that we would be "out" of control--and completely in His control. It's safe to assume that most of us desire the surprises and the adventure (right?). To go even beyond that, He wants to give us those things.
My prayer is for a greater measure of this--that it would continue to go from our heads to our hearts. I pray for courage.