I've always found the anarchist thread in 'V for Vendetta' gets underplayed in online chatter. Everyone talks about the cool mask and the Guy Fawkes connection, which is valid, but the comic seriously digs into what anarchy means as a practical philosophy, not just chaos. V isn't just blowing stuff up for the sake of it; he's trying to tear down a system so people have to build something new themselves, and Moore doesn't pretend that's a clean or safe process. The book forces you to question if the society that comes after could just be another version of the same oppression, which is way heavier than most hero-versus-bad-guy plots.
What sticks with me more, weirdly, is the theme of identity being constructed. V literally rebuilds himself from nothing after Larkhill, choosing a persona and a symbol to embody an idea. Evey goes through something similar but in a much more brutal, deconstructive way with her imprisonment and 're-education'. It's this recurring question of whether we're defined by what's done to us or what we choose to become, and the comic doesn't give an easy answer. Sometimes the mask you wear ends up becoming your real face, for better or worse. It's less about secret identities and more about the performance of self in a political landscape.
I mean, you can't talk themes without mentioning the corrosive nature of unchecked state power and the surveillance stuff, which feels more relevant with each re-read. But the heart of it, for me, is the weirdly personal cost of a political idea. V sacrifices his humanity to become an icon, and Evey has to decide if she'll do the same. The ending isn't triumphant; it's ambiguous and a little sad, even with the explosion. The system falls, but so do people.