I completely agree. What's so nice about DropBox is how little I notice it. I'm a happy customer but interestingly I would be a wary investor. I'm not seeing their growth strategy. I've been looking for them to build on their advantage for about 7 years now. New products they've introduced to satellite around their core sync technology don't ever seem to hit traction.
That doesn't mean I think they're a decent business and will stay around. I just don't see much on the horizon that would push the business (and the stock) forward.