This week I (more or less) finished writing flirts/player-initiated dialogue, and PC-NPC/NPC-NPC dialogue for Chapter 4. And as I saved Player.d for the last(hopefully) time, I noticed that the total amount of .d-coded dialogue in IWDNPC/Dialogue directory was exactly 500kb. Which makes it about ~330kb of raw text, about the same amount as Keto or Kelsey.
(Don't remind me that Xan alone has well over 1mb of raw text. It's scary.)
Player-initiated dialogue and flirts are quite detailed, though there's not as much as, say, in Xan's or Kivan's menu, simply because the game is shorter, and you won't have that much time on your hands(and extensive NPC-initiated dialogue plays a role, too). But as for exchanging a look, a kiss, a smile, asking a question, saying a compliment(or something else) - yes, they are perfect for that.