the only time I have had a problem is the first two weeks of December - the parks are pretty empty -
DVC resorts however are hopping....
many DVC member love this time and go every year.
the Christmas decorations are up - everything (and I mean everything) looks great.
the Christmas shows are happening.
this is a great time to be at WDW - the weather can be unpredictable - but most of time it is great too.
Also hard to get time is Thanksgiving week.
for food/wine festavial - the Epcot resorts - BCV and BWV can be hard to get.
Christmas week is generally not hard to get - it is very crowded at the parks and most regular visitors (which DVC members tend to be) avoid this time - oh someone might go once - but that is generally not a popular time with DVC members.
If you ever want the standard vs preferred view at BWV - it is best to own at BWV. they are very hard to get all year long.
however if you case - since you seem to like everything - maybe you could consider OKW - it is cheaper and has the lowest maintence fees - but you need to ask yourself will be happy staying there if when you try to change at the 7 month time does not work. if you can answer yes - you have found your resort - if no - kept looking.