man, I got like 3 unlisted stories rn and idk which one to work on first, help me guys

1. is something really important and is the coolest story I ever thought of, but is way long and time-consuming
2. is a horror story which is so far the most fun horror story I have ever heard, I mean 'fun', but it needs a bit more improvement
3. is a sci-fi story for people who like theories, mind-bending stuff, etc

tell me which one should I give more priority