You cannot take things too personal, because we have to remember that we are all the to do a job. Alot of individuals take their jobs very seriously, which everyone should, so when things don't go as planned they get upset. I know personally, when I am given a task I give it 300%, and nothing less. So, when things do not go as planned, I get a little bummed. I do understand though, that I have to seperate that from my coworkers, because they do not have any control over my success or failure.