I wholeheartedly agree. The J12s are different than all of the other ceramic watches. They are by far the best looking ones I've seen and while all of the copycat watches will most likely go "out of style" soon, I think the J12 is here to stay. It's simplicity (as someone else mentioned) and symmetry definitely make it a candidate for classic status.
As for the ceramic watches turning yellow over time, so far I haven't experienced that and I've been wearing one every day for over a year now. I believe the ones that turn yellow are either low quality ceramic or the ones that have a ceramic coating over a stainless steel or base metal center. As for them getting dirty, mine does get dirty, but only in between the linkes, never on them, so it still looks perfect, you have to really look closely to see the dirt. Add the extreme scratch resistance (I can't see even one!) and I'm definitely sold.
All of that being said, you should always buy what you love. Who cares if right now everyone is wearing ceramic and in the future they aren't? It would be foolish to buy something, not because you like it, but because it's trendy. If your enjoyment of something is dependent upon the people around you, that's not good.