I think "Buy where you want to stay" is valid only in certain circumstances. "Buy where you
wouldn't mind staying" is more logical, but also has zero value < 7 months.
First of all, obviously you have to CARE where you stay, and presumably, you'd want to stay there most of the time. This particular requirement does not fit our family; we want to (and have) tried many
DVC resorts.
Second, you have to be able to firmly set your dates, and reliably be able to book within your 11-month window. Not everyone can book vacations 11 months out because of job constraints.
If you're trying to get a GV anywhere, standard view at BWV, F&W at BWV or BCV, or just about anything between Thanksgiving and New Years, you're going to have to book exactly at 11 months, and sometimes book day-by-day precisely at 11 months. If you think you're going to book standard view BWV at 8 months, you're living in a dream world.
If you can't book most of your vacations > 7 months out, you have no home resort advantage, so it doesn't matter where you own.
It also matters greatly when you plan on vacationing. If you are going to visit during peak periods, and you can reliably book 11 months in advance, definitely "buy where you want to stay."
But if you often visit during other times, you can usually get what you want inside seven months. For example, we booked a May 07 BCV studio at five months. My family has also booked VWL, BWV, VB, and HH inside seven months, including several bookings inside two months -- traveling off-peak most of the time, but not always.