☼☾
☼ - Something that/Someone who makes them happy.
Because of her early life, River is someone who will find whatever enjoyment she can, wherever she can - she finds enjoyment in many things, but pinpointing something or someone that makes her genuinely happy is perhaps a bit hard.
She’s content, and maybe even happy, when in the TARDIS, be that Library, swimming pool, or console room - it is and always will be, her home, regardless of which Doctor’s TARDIS it is.
She loves the thrill of adventure, but ‘happy’ isn’t the word she’d use to describe that. Similarly, she loves the Doctor, but ‘happiness’ isn’t always what she feels around him.
What, or who, makes her most happy are her children. She knows some better than others, and the timelines are always mixed up, but she loves her children more than anything else and loves to spend time with them more than anything.
☾- Are they prone to nightmares or dreamless sleep?
When River was younger - back when she was Mels - nightmares were extremely common - they were always full of people with eyepatches, and creatures she couldn’t quite remember. However, when she regenerated and grew older, the nightmares became less and less frequent. She rarely has them anymore, but won’t tell anyone when she does have them - she doesn’t like talking about her weaknesses.