Which room do you spend the most time in?
When DH and DS are in schools, I am mostly in my son's bedroom, since that where my computer is.
Which room do you usually eat in? Kitchen, dining room, elsewhere?
Dining room, which is the same room with the living room.
What are three things you love about your home?
Bright during the day, the fact that we are on the second floor, and reasonably sized (for an apartment)
Do you have a porch/balcony to sit out on, do you?
We do have a balcony, but it's not for sitting out. Instead, that's where we hang our laundry.
What is the messiest room in your home?
Hmmm... none of them, since I hate mess. 
If you could renovate, what is one thing you would do?
Have a bath tub installed in the bathroom and replace all of our window sills to better ones.