...and yes, the so often saying "good things happen when you least expect them" proves to be true.
I think all of us at least once have experienced this fact, 
haven't we? 
 Even so, I still believe that there is nothing wrong about having expectations, further more I think that by nature we have/create expectations. To have positive ones are good, are a bit like having  dreams or wishing something to happen.
 People fearing disappointment, it is part of the journey.
So then, when the unexpected occurs, embrace it and enjoy it 
as if there were no tomorrow.
W.Congreve said:Uncertainty & expectation are the joys of life

The Art Of Expectation by Stewart Blackburn