I guess I'm the odd man out, at least if we boil the question down to the simple "which is my favorite"..
I like the Lancers and I like Pmags. But my hands-down 'favorite' is Okay/NHMTG. Only issues with lancers is that they're a little less tolerant of max-oal loads, or at least one long load I've tried in them (the Prvi 75-grain HPBT round); and they're harder to seat full on a closed bolt than the Okays or Pmags are. Other than that, I've had no negative experiences with Lancer or Pmag either one. But fact is, other than maybe three or four that have been physically damaged/malformed due to someone's actions, I've never had any issues
at all with the Okays, in more than 30 years of using primarily that brand.
Not meant as a knock on the others, I'd trust Pmags & Lancers with my life; I trust them that much. But a 'favorite' is an inherently personal, subjective thing.