Dedicated to @kirksgorgeoushair and @KaylaMichelle982 thank you both for commenting and voting!!

Tony -

Carrying out several different experiments 

Steve -

Being hugged by him every day whenever he was near you

Clint -

Work out sessions and a mandatory date night once a week

Bruce -

Randomly planned picnics filled with your favourite foods

Thor -

Travelling to the different planets and different countries on Earth

Loki -

Slow dancing just the two of you and forehead kisses to remind everyone you are his