If you enjoy your job and like the pay, I'd say go with the guard. Getting paid well and flying sometimes is a great deal.
The other thing I'd ask is, "How do you feel about moving every 3 years?" For some, it's an adventure. For others, it sucks the life out of their family.
I'm glad I joined, and so far AD life is treating me well. That said, there is a lot to fix in the AF (like any big govt. bureaucracy).