Awwww soft and wonderful Snily (Severus x Lily) I saw multiple requests for this so here it is:
Gives nose/forehead kisses - Lily would be the one, especially giving nose kiss. Severus is self-conscious of his nose and she’d tell him how she loves this striking part of him. Also she likes the reactions she gets from kissing around his face and the little sounds of embarrassment.
Gets jealous the most - Severus doesn’t like being controlling so he’d always push back any jealous feelings, he very much trusts Lily and doesn’t want to get in the way of her free spirit, therefore I see Lily being the one who gets jealous. Not so much of other girls, but if there is someone who is particularly gifted and a pureblood, she’d want to show Severus that she’s just as good.
Picks the other up from the bar when they’re too drunk to drive - They tend to go drinking together and when they are in a relationship I can only see them getting drunk together especially if there is a karaoke bar. It would start off as just one drink and before they know it they’d be loudly singing together the way best friends turned lovers do. They’d go home using the Knight Bus and Merlin the first time Lily is on the Knight Bus she’d be ecstatic and have like 5 cups of hot chocolate.
Takes care of on sick days - Both! Severus really doesn’t like seeing Lily sick and he is very strict and gets frustrated when she doesn’t listen and keeps doing chores around the house and other work. Those days he’d really push himself to make better and stronger healing potions because he wants her healthy as soon as possible. Lily is very nurturing, but would probably point out that he could have avoided him getting sick if only he had worn more layers or had breakfast or took better care of himself. She would mix muggle and wizard medicine and make sure he’s well fed.
Drags the other person out into the water on a beach day - Vivacious Lily definitely would. She would want to splash around and try out the bubble head charm so that they could see fish and other sea life together. Severus would say no at first, but then he’d fuss if she starts swimming into deeper water and he’d go in after her to make sure she is safe.
Gives unprompted massages - Definitely Lily, she notices how tense he always is and how much he stresses. He wouldn’t want to bother her so he’d never ask, so she’d take the initiative.
Drives/rides shotgun- I see their relationship really balanced and they’d take turns if it’s a long roadtrip. Sometimes Lily likes riding shotgun so she can pick the music and stare at the scenery, other times she just likes driving. Severus doesn’t mind driving, but he can get frustrated by other drivers easily and he definitely slips into more of the working class accent when he curses up a storm.
Brings the other lunch at work - If he notices she didn’t pack anything for lunch, I can see Severus bringing her a lunch. Partially as an excuse to see her and also because he wants to make sure she has enough energy to go about her day.
Has the better parental relationship - I think anyone has a better parental relationship than Severus, but at least with Snily I see that Eileen really loves Lily and is happy that Severus found himself a witch and someone he connects to.
Tries to start role-playing in bed - Definitely Lily because she’s more adventurous and Severus would be shocked. It would start off as some sort of silly roleplaying scenario that they had growing up and Lily was feeling nostalgic, but then it’d continue and she’d scandalizing him by going further until they end up going at it.
Embarrassingly drunk dancer - Once again both of them would be. Lily is more likely to get on some furniture that she’s not supposed to and Severus would be more likely to use some sort of weird clothes if it meant getting Lily to laugh.
Still cries watching Titanic - I think both would but not until the very end when she has that dream thing about being reunited with Jack, but they’d try to play it off and just cuddle harder in appreciation for each other.
Firmly believes in couples costumes - Lily, she’d just find them more fun and likes including Severus in the things she does including dressing up. He really just can’t tell her no.
Breaks the expensive gift rule during Christmas - Neither would, they’d believe more in sentimental gifts with meaning rather than pricey gifts.
Makes the other eat breakfast - I see Severus cooking more than Lily in the mornings. He has less of a morning routine whereas Lily fixes herself up more and takes longer, so he’d help her out with this and if the food is ready she’d eat it.
Remembers anniversaries - Both, but definitely Severus who treasures each year together and still can’t believe that Lily is with him. Lily would definitely be the one who would push to do something special though because she loves Sev and would want to bring their bond closer.
Brings up having kids - If they have kids, I just see it as something that just happens. Not really planning because they aren’t thinking about it, but more organic and they probably wouldn’t necessarily even get married immediately.