Weirdly, I thought KT had a good explanation for Rogue's behavior. For most of her adult life, she wasn't able to touch anyone, and she had only really dated one person (well, maybe Joseph too, maybe), let alone had serious, long-term relationships. She's in love with Gambit, but also knows they've had a very complicated, tempestuous relationship, and is scared that she is making a terrible mistake with him out of lack of experience. So, she plays the field. She gets with guys who are interested in her, and, after Magneto, maybe goes for people with whom she doesn't have a deep emotional connection, because she wants something uncomplicated. Torch is pretty. Deadpool is . . . fun? Why not? She's single.
Yeah, I know it's a retcon of some bad male writing, but it's a good retcon. It makes sense.
Plus, Rogue canonically has terrible taste in men. She had a serious crush on Longshot, which is all the evidence you need . . . even if Joseph did not exist, and he does. She just got lucky with Gambit. :D