We have all met what I call a Debbie Downer. The person who can suck the life out of the happiest of occasions or find some reason to rain on any parade. Now as a formerly faithful watcher of the show Daria on MTV, I admit I do like a little cynicism and sarcasm, when done well, puts stitches in my sides. But how you view the world, people, life, circumstances is in fact a reflection of your character.
Life is in essence what you make of it and if you're like seems to really stink all day every day well - that probably isn't totally without your help. So much of the way life works out for you is really up to you. Now, that's not to say there aren't just days you woke up on the wrong side of the bed and you keep checking to see if there happens to be a full moon in broad daylight. BUT it means that the way you act under those circumstances reflects you and only you.
Everyone deserves to just have a bad day from time to time. Be cranky. Get out a good cry. Hole up in your room and pout for a day by all means - but one day. Not everyday. Remember that the attitude of those under you is a reflection of your leadership and that your character, good or bad, shows through by the way you view the world.