should two become one?

Admit to being an enthusiastic lurker rather than a poster but hoping you can help. We are moving to a Victorian terrace. The standard shape - front reception, smaller rear reception and then kitchen at the back. Most of the houses we have looked at have the two receptions knocked together to create a big through room. Our one still has two separate rooms. I can see pros and cons to both but would love your thoughts on whether we are better off keeping as is or knocking through. Not so worried about the actual building work as we have other things to do in the house but for the long term is it nicer to have a big airy room (albeit one with two distinct halves) or two completely separate rooms that you can use for different things. Appreciate your ideas and experiences