I would really love to get a card to get 'legal' just so I can grow my own plants, check out dispensaries, or do whatever. However, it costs so much to go through the process to get a card that I feel like I am better off just buying a zip. Not to mention, I have no medical problems whatsoever.
Just an FYI though, you run into cops in the wrong situation, and you could still end up getting boned by the law. My dealer has his card but he ended up in court with a possession charge, and the judge just said that the card means nothing because marijuana is a federally controlled substance. Sounds like a dick judge to me, but just a heads up to everyone, it could happen to you.