Jotaro’s an early to bed, early to rise type of guy, but he does wake up frequently throughout the night. He suffers from chronic nightmares.
★ - sad headcanon
When Jotaro is upset he rarely lets others know. Someone that’s especially close to him might be able to tell, but even if you do ask him about it he might just brush it off as he’s the type to just refrain from sharing his feelings (he bottles things up). He does just tend to not let things upset him and distracts himself from unpleasant thoughts and feelings—this is part of why he’s so immersed in his work.
✿ - Sex headcanon
He prefers to take on a more dominant role between the sheets _(:3」∠)_
♦ - quirks/hobbies headcanon
To this day Jotaro is still absolutely terrible at video games. The Duwang kids invite him to play on Josuke’s Nintendo 64 sometimes, and the own his ass every. Single. Time.
∇ -. old age/aging headcanon
Hair color aside (refer to this post), Jotaro ages very well. At 28 years old he doesn’t look much older than he did when he was 17. At 41 (in Stone Ocean) he still doesn’t look a day over 30. He’s been blessed with good genes.