Sides of Billy Only You See
Early morning sleepyhead: Billy is not a morning person, but the fact that he has to make it to work to make a living is a great motivator. He always tries to gather extra patience when greeting you and talking with you after he wakes up because he doesn't want to say anything he doesn't mean, and you are always the most important thing to him.
Contemplating his actions: He knows that sometimes he says unnecessarily mean things or takes the conversation too far when his temper gets the best of him, and he does feel bad about it when it happens. You'll sometimes catch him getting quiet, looking off into the distance or down at his shoes for a few minutes before making an uncomfortable trek up to someone he owes an apology to.
Introspective curiosity: After everything he has been through, Billy has repetitive episodes of wondering why he has certain feelings and what the meaning of his future is. This is usually late at night when you can find him chainsmoking next to an open window, playing soft music so as not to wake you. He will always let you in on his thoughts and questions, and you are always there to remind him that he is a good person despite his past, and he is healing.
Childlike playfulness: He would never let anyone else know it, but Billy gets excited pretty easily, and he loves to rough house and tease you and his closest friends. He will sling you over his shoulder like a sack of potatoes and spin you around until you're both dizzy, have splashing fights with you in the pool, and will chase you around the house, jumping over furniture to play an impromptu game of tag. He loves the simply joys of childlike fun.
Notes around the house: He works some early mornings and some late nights, so he is always leaving you sweet notes on the fridge, on the counter, in your bag. Despite what other people probably believe, he is rather well-spoken in writing, and he is always signing his notes with, "your secret admirer" to keep the inside joke alive about how the two of you met.
Singing and dancing: Billy loves music, and even though he keeps his cool well in front of others, he will always sing, dance, tap on random things around the room/car, and pretend like he's putting on a show for you. He will also never confess out loud that he is a diehard Duran Duran and WHAM! fan. He is always playing music at home, and he will randomly walk into the room, grab your hand, and spin you around before engaging you in a partner dance while he lipsyncs to whatever song is playing.
He cares what your family and friends think: Billy always takes the time to think carefully about how he acts and speaks in front of your family and friends. He wants them to know that you are treasured and well taken care of, and he is careful to always be as respectful and patient as possible when interacting with them. Your parents adore him, and your friends are starting to come around after seeing how helpful and empathetic he really is, even if they already knew of his past.
This is my first time making one of these, and I'll definitely add to it as I think of more. These are just some starting ones that I think of a lot.