I have worked with people in the past who do not enjoy their job and make it obvious to everyone around them. It makes it tough to get on and enjoy the day and lowers the morale of the place. My day job now can be quite challenging and some people struggle with that. Again, it can make the day hard. I believe that if you are at work and will be there for some time, make the most of it. You still have a job to do and you are not doing yourself any favors by being negative. If you do not like your job, seek advice on how to change (or see my hub, 'help, I hate my job' ;) ) - there are other options out there.