For the most part they're there to give you more info on the characters before jumping in, at least the Day 1 options.
All the decisions that hold significant weight should be tonally different in how they're presented if they're going to hold something like a password or ongoing narrative consequence outside of just romancing your potential partner.
I think just picking what you like is the most organic way to play this and probably what I'd guess is the most enjoyable experience if you were playing this as a complete product.