Personally, I want to see the timeline 3-4 hours back. When I miss looking at Japanese TL,  because it's so fast, I would have missed entire discussion topics. So would like to catch up when I feel like it without scrolling down forever.

Generally speaking, notes from Top10% of follows, in last 2-3 days may be good. This can be a list, but I want it to be more dynamic. And also, maybe notes zapped by follows can also be included there. Or different choices of TL other than trending and most recent from follows.