For me romance is about the anticipation of the couple getting together. I love almost first kisses. You know the moment when you're sure the couple is going to kiss and the author has set it up so that you are rooting for them to get together, but then they don't for whatever reason and you're disappointed. That moment of anticipation stretches out the romance for the couple.
Because I don't want the kiss between the hero and heroine to happen too quickly, I'd prefer that it wasn't represented on the cover. I'm not sure if that sounds logical or not. All I know is that I want to be able to picture that magic moment of the first kiss in my mind. For this reason I like romance covers to have near kisses rather than full ones
Don't get me wrong, I won't refuse to buy a book because there is kissing on the cover, it's just that I prefer them without.
What's your preference?