I've read maybe seven or eight trade paperbacks worth of the comics, and it's really good stuff. I'm very into various world mythologies, folklore, literature, etc. and the comics tap into all of that in such cool ways. Read some of the various offshoots as well, like Frankenstein Underground. Haven't read any of the B.P.R.D. titles, though, or Hellboy in Hell which is apparently excellent.
Love what I read of the comics, love del Toro's films (in a very different way), and.... I have not bothered with the 2019 film, which I thought looked absolutely dire. Jury's still out on this new one (glad it isn't using generative AI shit), though I really wish we could have just gotten a proper third film to cap off del Toro's trilogy before moving onto what is claiming to be a move comic accurate reboot. Also, I feel like Hellboy as a character and the world he inhabits would lend himself very well to an animated film, if given the Spider-Verse level of care (and, presumably, a comparable budget to see it through) that strives to actually look like Mignola's artwork come to life on screen. I think that would appeal to me more than yet another live action reboot, just 'cause of my pre-existing attachment to what del Toro has already done in that space.