who wakes the other one up with kisses: in the morning, it's definitely natasha who gently pecks bruce's stubble to wake him. when natasha is napping, he's the one to kiss her nose gently. he's not a morning person, ahah.
who cooks for who: natasha will most likely cook for him if they don't go out to eat. however, that's usually the case for them, so they can play footsie under the table at 3 am in a diner.
who is the morning person/night person: they are both night people. they're more awake at night. natasha takes naps in the day while bruce powers through. he's the first to fall asleep as natasha reads in bed.
who is the romantic one: neither are really that romantic, tbh. natasha may be a bit more than bruce, but it's not lovey dovey or hearts and flowers. more like 'you, you're good, i like you'.
who is the top when it comes to sex: it varies. sometimes natasha tops and bruce doesn't mind that. though when he has had a bad day, he's more likely to top her.
who would lead in ballroom dancing: bruce of course, once he's pulled to dance by natasha. this usually happens in his lab or her apartment, where they are alone and won't be disturbed.
who is the more cuddly one: the cuddle that they do is draping a leg over the other or resting a head on the other's shoulder. there isn't much hugging and clinging going on, gentle touches. they are more likely to cuddle while they are asleep than awake.
who is the one to most likely pick the movie they watch: natasha.
who is the one who would pay for dates: natasha is usually the one to pay for dates. sometimes bruce surprises her with his wallet in his pocket, but most of the time he says he's broke and natasha pays for it, even though she knows he's not, ahah.
who is the one who would initiate a quicky during classes: natasha and bruce doing a quickie in hallway or on his desk in his lab. probably natasha, though, it's a mixture of both. bruce growls and gets her hot and bothered, though she's the one who makes the jump.