1 6 8. Feeling pain/having to deal with diseases sucks. 8 is broken and theorically can pretty much do unlimited money by itself by just using one of the 3 changes within the past(betting somewhere on the stock market or saving the life of someone extremely rich, idk, i'm not gonna try to get too creative with it but there's certainly ways to make it so that you're at least pretty rich later if things go well, which is good enough for me). Then for the other 2 i'll just do the things i regret not doing earlier in my life, which presumably would mean a happier time on the present. For the rest to me it'd be between 4, 5,6 and 7, but honestly if i'm thinking of picking 4 then i can also for example just go back to the past and create the covid vaccine(which would basically also do 9 again). 5 sounds really scare after some time and also sounds like u'd eventually live bored forever knowing you're smarter than everyone, and 7 sounds good to see what actually happens in the afterlife but scary as well. So ended up with 6 because it just sounds like the best for an enjoyable life.