"How is my depth on this squat?"
There's nothing wrong with this question in a gym setting, especially if the squatter doesn't have a camera. But, I see this question on the internet a lot with an accompanying video. Yes, I understand that different powerlifting federations are stricter about judging, but no, there really is not any mystical know-how involved in judging squat depth. If the crease at the hip is parallel with the top of the knee, then it's "parallel" (also called a "half squat"). If you squat as deeply as your hips and knees allow, then it's a "full squat" (also known as an "ass to grass" or "ass to ankles" squat).
This fellow on the left is at parallel, and the gentleman on the right from Catalyst Athletics is full (front) squatting: