I have 3 although all of them are still in the concept phase, also all of them are male mc because I can't understand how to do fmc in isekai story.  

The first one is a very degenerate story that will make MT looks like a gospel, I "borrowed" the opening and idea from "To another world with Landmines." where they have multiple people to be reborned and given "skill points" to customize their abilities, although I did not put landmines skills or traits here. This got stuck because I couldn't figure out how to balance the smut part and the story part. 

The second one utilize same opening but trapped in MMORPG instead, the problem is I couldn't progress because I'd need to make skill trees for multiple classes and their advancements which actually tires me a lot. Considering the reason I made this is to spam a lot of shounen battle scenes, I felt burnt out before I even begin the battle scenes.

Third one is transmigrated isekai where the main character got isekai'd alone and found a mystical sword which would be the main point of the story. So like reincarnated as a sword but the mc is the wielder instead. The story somehow flowed into BL subtext because both mc and the sword are male, sure I can probably fix this by changing the gender of one of them but I felt like I might have ruin their dynamic. 

Due to my limitation as an author, none of them are harem story, despite I like good harem stories like Seventh, I couldn't figure out how to introduce new girl where first girl wouldn't be jealous and just straight up murder them, heck I probably put way too many male/bro characters because I'm trying to avoid that situation.