My first time through the game was as a LS female, and the "romance" stuff was really weak. It seemed like the Disciple was supposed to be the big romantic interest, but when I first found out his backstory I couldn't help but think "creepy stalker." Atton had some fun banter (mainly on Peragus, talking about the Exile's semi-dressed state), but it just isn't enough. And that's sad, because Atton was awesome.
I'm a little bit into a DS male game, though, so I'll hopefully see slightly better romance soon.