I beat CV3
Awesome! It's really one of the high points in the series. Castlevania 3 is a weird one for me though - it's frequently referenced for its difficulty, but I don't think it's one of the tougher CVs. I've never beaten Bloodlines or Dracula X SNES without save states, and I've never beaten Haunted Castle or Vampire Killer MSX at all. I know it might be because I've been playing CV3 for so long, but I've put quite a bit of time into Bloodlines as well, and it just never gets easier for me.
Anyway, I'd recommend playing though the Alucard route someday if you're up for it. Yeah, some parts are pretty challenging, but it has some cool level design and killer music. And then you can play through the early stages again on the second loop, and you can use Alucard to access some additional ledges and shortcuts.