I’m a DC Comics guy
Grew up reading comics from many publishers (still do!), and while I’ve loved a lot of Marvel books/characters over the years, that universe itself often seems too dark and ugly to me. And so many of its characters came across to younger me as emo and whiny lol - not what I aspired to be, when I myself was an emo and whiny kid. I didn’t fantasize about being whiny teenagers like Peter Parker or self-loathing mutants. I dreamed of being a strong and sure grownup, like DC’s (main) lineup of heroes.
Also, I’m from California - I never gave a crap about New York or the east coast, and 90% of Marvel’s heroes are NY-based or east coast. DC’s settings are fictional cities - Metropolis, Coast City, Gotham, Opal City, Ivytown, Star City, etc. - which may have had real world inspirations, but it was easier to imagine them being anywhere I wanted - so I didn’t feel excluded simply for not being a New Yorker.
I just find the DCU much cozier and more fun. Superman and Batman are my two favorite superheroes, period - and there’s no female hero at Marvel which is as iconic and historic as Wonder Woman. I love the dynamic these three original yet very different heroes have had and continue to have today.
Another thing I’ve always preferred about the DCU is its unique history of legacy heroes. Golden Age heroes like the Justice Society being mentors to their younger Justice League counterparts... then the Justice League raising the Teen Titans, who then grow into the Titans, who mentor new Teen Titans and Young Justice... it just makes DC feel like more of a family to me. Marvel’s done a good job trying to duplicate that over the past 15 years or so, but the history’s just not there for me like DC’s real-time, established multi-generational history is.
That being said? I am a comic book fan, a fan of the medium itself. Great stories and characters are born from great writers and artists - and they can come from any publisher or brand at any time.