Okay, so these are the ideas that best fit the "story" category (some of the other ideas I have are better suited to personal ocs). Please give honest opinions, I'm always open to questions and constructive criticism
and like I said, these are just vague beginnings of more complex stories
•(All credits for this idea go to my subconcious for giving me this in a dream
) There was a man whose selfish desires caused him to use a risky form of magic in order to make himself wealthy (or something like that, I feel like just wanting to be wealthy is a pretty dull motive) but ended up destroying 99% of the population (and radiation from the destruction caused certain animals to become violent and toxic). Our story follows an excellent survivalist (he'll have a really cool personality too :3) who wanders the earth looking for that 1% of survivors so they can help defend each other in a dangerous world. In the end I want him to create a team of really diverse characters who compliment each other really well and are fun to watch. Definitely a feel-good concept even though there's danger involved, I don't want it to be heavy
• This one's so vague but sounds cute. It's about a world hero who is the strongest, most powerful person on earth. Everyone thinks he's really tough until he falls in love with someone and becomes a complete softie (feels like a common trope, but would hopefully be endearing enough that it could gain traction)
• This one's really hard to explain, but I'll try. It's about an ordinary man (literally as plain as they come) in a bounty hunter world who falls for the most expensive and most wanted bounty on earth (an innocent but ethereal woman who is extremely valuable for unknown reasons) and becomes obsessed with protecting her at all costs. He goes from being a dull businessman to one of the most powerful men on earth just so he can keep her safe (lots of emphasis on character development in this one, whether good or bad. I have a really hard time explaining how it looks in my head, it's so much cooler there I swear
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• And then of course we have the story about the kid and his abusive dad.
So those are the best of my stories that fit the manga format, I also have a concept that would work very well in novel form, but I'm not a good writer, so Hawk, if you like this idea, feel free to play with it cuz you're awesome at writing 
• This one is about an eccentric, secluded (and most definitely demented) man who has the ability to create mechanic human replicas of some sort (don't know how he does it). He has made so many of them, but every single one has failed. Nevertheless, he continues to make more one at a time, each one thinking they are the first and having no idea they are not real humans. The story would be viewed from the perspective of the most recent replica, and they will explore their seemingly normal life until they start finding clues and evidence of the man's sinister past and the replicas that came before them. Kind of a slow-burn horror story that has many holes at the moment 