The concept book

I'll give some story descriptions and y'all tell me if they're good or bad. Some of these stories I've already started writing. Others are just concepts. Please give honest opinions (preferably in the form of constructive criticism or compliments). I may not write or publish all (or any really) of these, even if it's a well liked concept. This is because I may not execute in a desirable way or not be able to finish it. This will use story descriptions or general ideas for a story (one method per story), genre, and any other information about the story (such as my reason behind writing it and disclaimers). Genres are subject to change, but will not change the story itself.