Something that has always bugged me about alternative history worlds is not the premise, or the events that might happen where the timeline splits off. It is more that people we know exist after the split. Given how biology works, ending up with the same people after a split in the timeline (with consequences) becomes almost impossible. When making any decision to split a timeline, one must tread, and know the time carefully. Knowing what famous people, born after the split would do in that world seems a bit ridiculous, but I guess that would be a measure of the "hardness" of the genre. For sake of discussion- What are the best alternative history stories you've read, and did they have characters that we would know, born after a split? Did they explore the split in detail? Does this desire to see science followed bug you as well? What's your favorite split off, either already done as a novel, or as one you would ponder doing yourself for a story?