I played through Black Talon when I had the opportunity and I have to say I thought it was great. Loads of story backing it up and a good place to get some social points. I've since played two other Flashpoints and the conversations have been limited to say the least. Which other flashpoints have a good story focus like BT?
Black Talon probably had the most dialogue out of the flashpoints you will encounter.
In the 30s you will get the next Flashpoint with actual story attached.
At 50 a couple flashpoints have about the same story as the 30s.