Retrofitting a new home efficiently a do-over

Hi all - hope you’re all keeping well!

My question is if given the chance to do all the work all over again in your home would you, and if so what would you do differently?

I ask this because its been a year since I moved into my property home and since winter hit I’ve been thinking it would have been awfully nice if I got underfloor heating and insulated floors and had Ethernet ports required in each room for faster access.

Just curious about what big projects you regret either doing or not doing and what you would do if you were just moving in to a new property and as a guide what are some things you’d recommend doing on a project.

Many thanks,