Canon things about Xavier that I think are funny and people might forget:
Loves spicy food but dislikes wasabi
Enjoys multi-culture foods as long as it involves meats
Dislikes extremely bitter things
Neutral on sweets, it isn't his go-to and doesn't often get them alone, but does occasionally enjoy them
Prefers savory, salty, and spicy
Alcohol tolerance is very high
Not a fan of vegetables but doesn't mind them juiced
Favorite fruit is cherries
Has a massive two-person bean bag chair that occasionally he or MC nap on
Has a workout section of his house so he doesn't have to leave the house and can nap right after working out
Has a garden on his balcony with a few flowers, herbs, and frequently harvests strawberries
Prefers homeopathic and traditional medicine
Great at making coffee; the one time he messed it up for MC even he was surprised and blamed his coffee maker, it hasn't happened since
Good at cooking things that are cold (anything that doesn't require heating up), master salad and sandwich maker although according to 21 Days he's also improved in soup making!
Is extremely rich and philanthropic
Graduated with several degrees
Volunteering and side jobs to help backtracker friends, Jeremiah, and other older humans he's met through his lifetime
Commonly stops to help strangers
Despite oversleeping a lot he's never late (lucky)
Has become a morning person even waking up earlier than MC often
Is a ranked FPS player š (He's platinum)
Has a lot of friends he goes out of his way to see often, outside of MC
Stopped practicing piano for a while
Occasionally helps out at a bookstore near the seaside Destiny CafƩ
Holds on to a lot of nostalgic things, even if it's useless
Weakness for small children
Traditional calligraphy (masterful enough to teach)
Generally good at all video games
Can't stand cheesy movies
Is known to commentate over movies he's not enjoying (yes even if MC is present and enjoying it until she tells him up shut up.)
Music (Listens to a wide variety and also composes his own)
Photography (digital + film)
Fondant + cake decorating (don't ask him to bake it though he can decorate)
Absolutely horrendous at drawing but he likes to doodle
You think he's soft but has ruthless comebacks
Won't hesitate to say no even if you beg
Makes time and effort to spend time with other friends
Often asked to babysit Frankie
Has had to kill off a lot of people who've turned on him, in order to protect MC
Prefers phone calls to texting