To figure out which resort to buy, I would first look at your family's vacation habits and abilities.
The first question I would ask is whether you reliably have the ability to book vacations more than 7 months out routinely, and at exactly 11 months for peak-peak times. Many families can, but many other families -- due to work or family constraints -- can't. If you can't or won't routinely book early, home resort does not matter for that reason -- which is the primary reason people care where they buy.
If you CAN book 7-11 months in advance, I would consider how important (if at all) it is for you to be able to stay at a specific resort, or in a specific type of accommodation, at a particular time. For example, do you REALLY have to have MK view at BLT during Christmas? If the answers to those types of questions are yes, then you NEED to own at that resort.
If you can't book way early, or you don't really care so much where you stay, your home resort choice should probably revolve around economics -- NOT theming, location, or decor. If you're going to be booking mostly in the 7 month window when "points is points" then go for the lowest overall price you can get and book whereever you want with those cheap points. Lake View at BLT with $50 points and low dues is a beautiful thing compared to MK view with $140 points!
The caveat I would give with the above advice is to NOT consider any non-WDW resort unless you plan to use those points at those resorts. Not owning at WDW, you could get shut out during really busy times. If you own one of the WDW resorts, at least you have the 11 month window there. At seven months, you can try to switch, but if you fail you still have a reservation onsite.
Incidentally, if you look at the DVC Resources stickie at the top of the page, you'll see all the dues history, size of rooms info, etc.