Question about weight and BMI?

So I'm naturally very muscular. I have really bulky legs, arms, etc. but I can lift a lot more than even my most athletic friends despite not really being into sports myself. I do have a little bit of belly fat but not much.

I'm currently 6' tall and I weigh 205 lbs. However, my doc said that according to my BMI I'm obese and need to watch what I eat carefully. Another doc told me that my waist is what matters more. My waist is 34", and anything less than 35 is really good. Plus, even at my lowest weight since I've been this tall (197 lbs) my waist was only 32". So my question is which advice should I adhere to? I'm sure I could lose some weight, but I'm muscley! BMI doesn't take that into account, and I surely don't have 30 lbs to lose.