I know that this is a stupid point to ask about, but did Jake ever like blue ladies? I thought that was John's thing, which confused me. I could very well be remembering this totally wrong, though.

It was Jake’s thing. He kinda liked Aranea and had a whole section on his wall dedicated to blue ladies.

Although I can see why you’d think it was John’s thing as he’s canonically shown interest in more blue ladies than Jake.