I believe it was Dharsi, one of the evil dragons early on in Shian's RP history that was one of the most fun to play with because we actually talked to each other as players to make sure we were on the same page and didn't step on each other's toes as players while our characters threw insults at each other.
This is also another issue to me- Without this type of communication it would have been way too easy to take this stuff seriously and end up with hurt feelings as players.
The downside of this is I ended up in scripted RP more than I wanted, but it was a necessary thing, especially when it came down to mate choices and all that