I will say waiting around (you do a lot of that in the miltary) by yourself is bad, but it's worse with others. You don't only have to deal with your own boredom, but everybody else around you too. A deck of cards has always made the time pass by a lot better...even better than a good book and I love to read.
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Spemque metumque inter dubiis - Hover between hope and fear. (Vergil)