I'm a network admin also and my days mostly consist of me surfing the net. My job requires me to be here at work because if something goes wrong, they need it fixed ASAP. Well, there is no way in hell, I'm just going to sit here at work and not get paid, so I put in all my hours. Otherwise, I've got much better things to do with my time.... like sit at home and post on ATOT. 🙂
To be honest though, my job can be VERY stressful at times and sometimes that stress doesn't let up for days. I figure, I'm well worth what they pay me. 🙂