If numbers were any indication then Yugo mags are my favorite... with Russian bakelites a VERY close second (mixed between all the variants).
I personally adore my Bosnian and Croatian magazines, and my Norks and Pakis are prized possessions as well.
It's hard for me to say whether I like the old Soviet bakelites or the ((10)) waffle mags more. I love buying and collecting the bakelites, but for range use, training, & SHTF purposes, I like the waffle mags more. I do go shooting with my bakelite sometimes, but I'm a bit more gentle on them than I am the waffles.