That's cool. And that's part of my like for both franchises.
The Romero Zombie to me is just the scariest movie monster. They look like us and you'd have emotional attachments to them. Seeing how people respond to them and learn to adapt to them is a huge part of my love for the zombie films/shows.
It's also a Biblical thing for me. The idea in the old Living Dead films is that "when there's no more room in hell, the dead will walk the earth" line. I see the zombie thing as divine judgement akin to Sodom and Gomorrah but Revelation also mentions the dead rising. And it's sort of the Rapture in an even more horrible way. :{