School School School
It's the kinda thing that right now, you're in a good job and they're dangling the promise of full time work in front of you, and you're tempted. But don't be miopic. I'd sell my left foot on the black market for an oppurtunity like yours- having grad school PAY ME to come and do school. You won't regret it for an instant, not if you'll be studying something you're really interested in. Plus, having that Master's degree will look a helluva good on an resume when you get out of school, and all the expierence that you have gotten at your current job will help as well. Perhaps your current job will want you back once you complete grad school, who knows?
Life always gives you choices to either grow or stagnate. Right now you're being offered a very rare oppurtunity to go to grad school, something that fewer and fewer people are choosing to do. A Master's degree is a BIG DEAL to employers and a great chance to get even more schooling in, which is always good. You've gotten plenty of expierence at your current job, take the plunge and go do something different that will give you expierence in a different area, plus practally gaurentee that employers will be salivating all over you when you get out!
Remember... I'd trade you my left foot anyday and so would a million other people. Don't miss such a great chance

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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi