DS - yr 10 (15) happy to go to bed early as I like - usually 9 - 10ish and listens to music or podcast in bed - then up with the lark 6.30 - 7am happy as larry.
DD - yr 8 (12) is an owl, hates going to bed and faffs about well after 9pm, often gets up later to do something she's forgotten about...! But good grief is she a pain in the morning - won't get out of bed and shouts at anyone who comes near her, especially her brother. Oh for an easy life!