Choosing a primary doctor for DS, help!

[waterisntsomething]

So I recently moved back to Virginia and my health insurance starts March 1st. I need to pick out a primary care doctor/pediatrician for DS and i am nervous about it! I absolutely loved our Ped. in California but b/c we moved to CO and then to VA a couple months later DS hasn't been seen since he was 6 months. I am compiling a list of the medicaid approved doctors under my chosen plan and want to research and clal to ask some questions before i schedule an appt. I really want to find a doctor I trust and can have a good relationship with. What are the big questions you usually ask when choosing a doctor? I am delaying vaccines which wasn't a big deal in Ca (in fact my Ped suggested it!) but here I fully expect to get harassed about it.