I wasn't the girl who had her whole life and wedding planned out of anything, I did not think much of my dream home or dream job, so thinking about this was odd for me, but kind of fun. I wondered why it is so pleasurable to think about your dream future and came to this conclusion:
It is pleasurable to be in complete control.
That's why little girls think about their weddings and some become 'bridezillas'. That is why people love games like the SIMs and playing with barbies or dolls. Any sort of role playing game in general. Even playing pretend. It allows for kids to create and control their own 'dream life'. And for those of us who are too old for things like that, we day dream and imagine exactly how we would prefer life to be in the future.
Now of course reality sets in and we realize how little control we have. That is when those of us who have faith in God who does have control feel comfort. I could not imagine not knowing who has control of my life, I cannot imagine the discomfort or fear associated with that idea.
So even after the rude awakening of reality after a daydream of my ideal future life, I can still be joyful and comforted because of my God. How good He is.