Yay, assuming it's done right. I agree with what Pachamac is saying, really. Most of the other issues I have with romance is within a group setting. One on one, I've never had an issue.

That said my problem with romance in a group setting is that it all too often detracts from the importance of other relationships dynamics. And God forbid the romance is ever one sided. Just recently a player changed the sexuality of her character so that the crush mine had on hers could eventually be returned. That's nice and all for the characters, but it eliminated a chance for some good character development. It eliminated what I would've preferred to see: a platonic friendship. 

Romance also tends to lead to characters avoiding the same gender with group RPs. This irks me for a couple reasons: 1) LGBT characters are kinda left out of the romance altogether and 2) it again detracts value of platonic, sisterly / brotherly / mentor-apprentice type relationships. And they can be super awesome and fun. I'm not saying these sort of bonds can be built between characters of opposite genders, but very rarely is Male A's intention to become BFFs with Female A.