As the prior posters have written, owning at a specific resort can help increase your chances of getting the exact reservation you want at the exact time that you want it. If you want to stay at a resort other than your home resort, you run the risk of not getting exactly what you want. The degree of risk varies depending on different variables including the type of accommodation, the time of year, and the length of stay. The more flexible you can be about these variables, the more likely you you get what you want.
There is another factor you should consider when choosing a home resort. Maintenance fees vary at each resort. For example, if you own 100 points at BLT, the currently yearly MF is $3.78/point, or $378 a year. At BWV, the MF is $5.36/point, or $536 a year. That difference of $158 a year adds up over the years: In 30 years, a BWV owner of 100 points will pay $4,740 more in MFs than a BLT owner. Of course, the MFs change every year, and perhaps one day the BLT MFs will be as high as BWV; or they might even have a larger difference than today.