If I ever wrote recc posts, it'd probably be like 90% villainess stuff and then the remaining 10% like "here's a manga about a black hat hacker who became a white hat and struggles with wanting to return to the other side".
@unfresh the latter half is oddly specific, I am intrigued. Were you referring to a specific manga? 
@rexielscarlet I'M GLAD YOU ASKED

King's Viking is the manga I was talking about!

It's not something I see recced often, but I do enjoy it in the same way that I would enjoy, say, shounen manga, I guess. It veers closer to seinen.
Kings' Viking - MangaDex

18-year-old Koreeda Kazuki is a genius hacker whose only real skill lies with computers. Into his aimless life steps a wealthy man who makes him a proposition he finds impossible to refuse: that he will become Koreeda's investor on the condition that Koreeda use his abilities to help the man "conquer the world." In cyberspace where national borders hold no meaning, thus begins the story of two modern-day adventurers who stand against crime on a global scale.

MangaDex