Recently I like to read novels about time travel and slap in the face. One world after another seems really comfortable. At least the writing of each world will not have any bloody or sadistic plots. Of course, some of them are not excluded!
Here I just recommend the ones I have read that I think are good, or I will recommend other novels later O(∩_∩)O haha~, there are also completed serials. As for personal evaluation, you can just read it, after all, everyone has different opinions...