Very nice. I am going to call it 66 based on the small luster graze on his cheek and the mark on the neck, but that is darn close to 67. Split the difference and call it 66+.
Nice coin. I like the nice solid strikes from good dies. The services tend to be pretty hard on marking though so I'm going to guess MS-66. There's a little chatter and a small scratch. The '55-D isn't too tough nice and this works against it as well. By my standards it's a 67 or at least 66+.
Pcgs is hard on these. I think it's a 66, but for all I know they gave it a 65. Here's an old NGC no-line Fatty MS65 of mine... I can't tell the difference between this and a 66, perhaps even a 67.
Don't have the coin back yet, but people pretty much nailed it, MS66. This is the first MS66 (besides Ikes) I have received from PCGS after being disappointed so many other times. This wasn't even the first 1955 D i submitted to them. One came back MS63 and I can't for the life of me figure out why. They all came from the same original roll.