Needs Vs. Wants When Building a Home

In order to build a home, the needs and wants of the family must first be taken into consideration. The needs of the family could be a certain number of bedrooms – one for each family member, for example – while the wants usually include some of the unnecessary luxury features, like an in-ground pool.
I have my own set of needs and wants for building a home. Obviously, my needs will be more important than my wants, but if I can build a home with just a few of my wants, that would be pretty damn great.
Here’s a short list of the things that I need versus the features that I just want:

Needs	Wants
Three Bedrooms. Right now we have four people in our family – myself, my fiance (T), my daughter, and my son. Obviously, T and I will share a bedroom, while my daughter and son will each have their own separate rooms.	Four BedroomsAs I mentioned <—over there, we absolutely need three bedrooms for our family. Of course, another child is not completely out of the question at this point. . .
OfficeBecause I work at home, I need a home office. Working at the dining room table or in a little nook in my bedroom does in a pinch, but it’s really very difficult.	LibraryYes, a library isn’t necessary for every home, but you may not realize how I am about my books. I have tons – almost too many, if that’s possible. A room set aside specifically for my little treasures would be perfect. Ideally, it would also be hooked to the office.
Different Means of EscapeI know, this may seem paranoid, but I’ve always had an odd fear of being trapped in my home during a dangerous situation, like a fire or a burglary. To err on the side of caution, several different means of escape, such as several doors – front, back, and side, for instance.	Panic RoomYes, this one’s really paranoid, but when I build a house I want a panic room – ideally one with all the bedrooms connected to it. Even if I never use it, it’ll still be pretty cool to have.
Adequate StorageThis one’s pretty self-explanatory. Over the years, people often seem to acquire a lot of “stuff”, and we need someplace to stash it.	Root CellarIf a full basement is not possible, I’d like to find a way to build / dig out a root cellar.
Counter Connecting Kitchen and Dining This makes serving meals SO much easier, plus it serves as extra seating for large family dinners, if necessary.	Spiral StairsPretty impractical, but I like ‘em, so I want ‘em.
Open-ish Floor PlanI hate feeling confined, and I can get a little claustrophobic at times, so a somewhat open floor plan is a necessity.	Children Confined to One FloorNo, I’m not some kind of deranged mother that’s going to stash her children in the attic, but I would prefer it if they had their rooms on the first floor. The master suite, of course, would be upstairs.
Convenient, Reliable Heating SystemI’ve had “issues” with heating systems – or lack thereof – all my life. Ideally, I’d like to have a woodstove. While it requires a little more work, it’s cheaper and so much more reliable than electric or fossil fuel heat during a power outage.	Backup HeatAs mentioned <—over there, heat is an important concern for me. I like to be warm when the temps drop to –67 degrees in my area. I know heating with wood would be a very daunting task after a while, so a backup heating system would be great for my “lazy days”.An additional backup heating source would be great!

So, there you have it – my first list of needs and wants when I build a home. I’m sure there’ll be more but those can wait for future posts.
Am I missing anything? What would you need or want when / if you build a home?