I'd outright scratch time loop stories. The amount of research and awareness you need to fill in are outright ridiculous. You need to keep being aware of every single character, where they'd be, what they believe, what they're capable of. You need to to keep track of every single event. You need to pay attention that the small changes and their results keep making sense. Time loop stories are easier to question than anything else, because you're basically describing a physical simulation, in which every single element can be deconstructed. And oh boy, your readers will.
I'd say adventure stories can be quite nice to write. They offer a lot of freedom. As a personal tip, it helps to imagine the whole thing as an RPG. Just like on your PC you're going to immerse yourself in your character. What would you like him to get as a quest? How do you want to lvl him (or her)? And different from a game, you control how encounters develop. As long as you don't feel like you cheated an event, you're good. Aside from this, you should be fine as long as those events are things you find interesting.