My advice would be to relax and enjoy your membership. We've stayed at all of the onsite and offsite DVC resorts except for BCV, and haven't had one bad experience. We've enjoyed every resort we stayed in, and liked every room we've been given. I think I'm a pretty picky, spoiled guy in a lot of ways, yet in 10 years I've never been unhappy with a DVC stay.
So we're happy to call when we've decided on our dates, and the size of the room and take whatever's available. And something always seems to be available. At the end of the day, DVC always makes us happy. And if we ever do have a bad stay, we'll just get 'em next time.
There seem to be quite a few uptight DVC members here; be the opposite of uptight.