I often disagree with my Doctors, that said, I am VERY upfront about our practices. I have found a Doctor who knows I don't do antibiotics unless ABSOLUTELY necessary (4 days minimum of no improvement with an infection or a serious infection), who knows that even my 5 year old swallows pill form medicine because I don't want dyes and flavors in their medicine, that knows my kids eat all natural and I won't deviate from that to give them Pediasure or other supplements. I believe that a Mother knows her child best and if a Doctor won't explore options, then its probably time to seek a new one. I don't believe it is okay for anyone to tell you that you cannot spank your child... assuming you are not abusing them. For me, simply not spanking while at the clinic, if I agreed with everything else would probably not be a reason for me to switch. In regards to breastfeeding and wanting to push solids with a young baby, I would either switch Doctors or I would listen politely to their advice and do what I felt was best. My kids have all been "underweight", under the 10 percentile for their ages... I breastfed and my Doctors NEVER suggested otherwise until one of them hit a failure to thrive period around 9 months. We later discovered this was do to a gluten intolerance and occurred when she started getting solid foods.
When does taking charge of your child's medical become a bad thing? I think if you are constantly bouncing from Doctor to Doctor, that becomes a problem. Switching once because of a major issue is not a bad thing. I highly recommend interviewing Doctors before baby arrives... that way you have a good feel for the way they do things.