I hit a local park I've never hunted before. First signal turned out to a 1942 D wheatie 3 inches down. After that it was just clad coins and some junk so I decided to go into a grove of fir trees and check around there before leaving. My first signal there was choppy and all over the place but loud. I dug it anyway and down about an inch and found a beautiful but cheapish Chinese pocket knife. Couldn't have been there long.
My first signals seem to be my best.
Oh, and with her grandma's permission I gave a little girl that was watching me a penny I dug up. She thought that was pretty cool.