The first two are more developed and I can provide some details if you wish.
The first one is actually a story game you could preview for some of those answers. It is not nearly done, and not fully proof read though. It also probably needs to have some of the pages paired down, or broken up. But to answer your questions above dark magic is just a type of magic, like fire magic, it can be powered up through the use of onyx (each magic has a gemstone or rock type that amplifies it with natural magic). There is nothing that makes dark manic evil, except for how it is used and the stigma it carry’s. Everyone has a certain amount of each type of magic in them, like a mama pool for each element. Your character has little mama for other types of magic, but an ocean of mana for dark magic, making it your only option to ever use magic (you don’t initially want to use dark magic, but want to be powerful). I have a structure planned out, the first choice is to embrace/repair an old friendship (leading to “hero” track), or to push this friend away and remain isolated (leading to the “villain” track since your friend is your positive influence that keeps you from going that way. The idea is to slowly develop which every you choose and add in more choices like are you violent or benevolent? Or do you pursue love, or go the lone wolf route? Each choice alters your development slightly to aggregate 16 unique versions of the main character. That is the idea anyway. I have it all drawn out in a story map too. Maybe I should take a pic and upload. I am excited about this story.
2 is less developed, I need to come up with different endings. As it stands I only have one. The main characters dad is trying to conquer the entire world, and your only desire (due to your upbringing) is to help with that. The warrior that slays you is actually the king of another country, although you don’t find out for awhile. There is the silly comic relief right hand man as the lutient, who could make for another love interest. He is loyal to the king, and extremely powerful, but not as serious. He is one of the girl/main characters first friend, since he is the one that guards her room while she is recovering. There is already a warrior in the nation that she is “captured” by that tries to kill the main character, and is more like her father in his thought process (cull the weak type thinking), he could also turn into a more twisted love option that stunts her development. Eventually, the main characters father will try to invade the country that “captures” the main character again (the first invasion is when you are captured) and I want the main character to have to choose which side to fight on somehow. I think it would be fun to practice character development and romance.
Yeah 3 is the one I am least excited about. It is very generic, but would be good practice for a romance topic. Rather than a back burner this one will likely never happen unless I feel I need more practice in the romance genre.