I applaud your personal pet peeve as it's one of my own. Romance is romance, and if you're tossing together two random characters for the flash value of the pairing, and not backing it up at all in the plot and character development, then it's not going to be worth reading. And, to me, that goes for both het and same-sex couples.

In regards to pairings that have undertones, say of H/D, but don't actually develop into a relationship proper, I'd simply call that subtext and be done with it.