Don’t be shy about dropping hints. We’re not saying you should be totally judgmental about other people’s rings, but, well, you can be a little judgey. If you see something you love, talk about how much you love it and why. If you think someone’s ring is super f-ugly, say it (but be nice). Your guy will get the hint about what you like and don’t like, and you don’t even have to explicitly say what you want—though he’ll know where you’re going with this, because remember, he’s listening.