I was sure I wanted to own in first time I saw it in 96 - DH took a few years to finally commit. Our only regret was not purchasing sooner (hate to say I told ya so, but that's exactly what I tell him when he says he wishes we bought sooner!

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Of course it is a big decision, financially as well as a commitment to vacationing mostly there. I have been to WDW a few times before I went with DH & our kids, but when we went together for the first time (stayed at the Polynesian), we all fell in love with it. I'll fly, but husband won't, so having a vacation destination we both love so much that we can drive to made it a no brainer decision for us. Again....DH took some time to commit, he's a bit of a workaholic (one HUGE reason why I wanted it, it forces the man to take a break and enjoy the good things he works so hard for). We love it more now than we did before we bought it. We go together once a year, and I get it in a long weekend with my friends as well. It's a commitment to the expense of vacationing but so is any place else we'd go if we travelled once a year. I try to buy more tickets than I need with a no expire on them so they last two or three trips, this way we don't really feel the expense of them with every trip.
Good luck with your decision and have fun planning.