1 was dreadful
2 was moderately okay.
3 had me roaring with laughter, but disliked the way things ended up. I hate it when the 'romance' involves a girl boxed in without any chance of escape. That's not romance.
4 was first rate. I dearly wish it was rewritten as a series. Reminds me of "Akuyaku Reijou wa Danna-sama wo Yasesasetai" (the villainous noble girl wants to slim down her husband) with a potential to be better, which would be quite an accomplishment.
5 was back to moderately okay. Needed to play out the drama longer, so the idea probably wasn't right for a one-shot.