I hand form my patties. I used a press when I was in Spokane at my brother's place, but have never really felt the need for perfectly formed patties.

The thumbprint is a really good idea. I use it as a grease repository when I'm slow cooking (which is very rare with hamburger, I want it now) but will start using it all the time. GREAT TIP

Thanks for a wonderful post. I really do appreciate it.