Which brass do you prefer for reloading?

[mikein]

I went to the gun show in San Antonio yesterday, and a guy was carrying around a shoe box full of mixed head stamp .223 cartridge cases. He wanted $10.00 for the entire box. I offered him $7.00 and he refused. About a half hour later he was still carting the box around, so I made him the same offer and he took it! I sorted the brass and most of it is:

Lake City
Remington/Peters
Frontier (Hornady, I believe)
BHA

There were a few Winchesters, PMC's and Federals.

Which head stamp do you serious reloaders prefer, and why?