I'm unhappy with front 6 crowns. Am I being overly critical or do I have valid concerns? (photos)

In August I had 6 crowns placed. After the cement they don't feel uniform, 3 on the right protrude more than the other side, 2nd to front left is at an angle and darker, black v's between my teeth, I can feel the air when I speak, am having problems with stuck food, they get tight then creak and just seem big and wide. I went back to my dentist but no one saw an issue. I return to my dentist next week - am I being overly critical or do I have valid concerns and if so, how best to explain.