I'm glad you're enjoying it. Unfortunately, a number of bugs have been found, and so there will be a point release to fix those and any others that come up (people usually find them all within the first three or four days). One of the difficulties of being the sole developer is that it can be hard to find your own mistakes!
There will be more expressions for other characters, or at least those who play any significant part in the story.
But I'm not sure about the main character - I wanted to keep him very generic and keep the focus on the people he is talking to. It's not like you see yourself when you talk, if you know what I mean, and giving him expressions seems like I'm telling you how you're supposed to feel.
I've seen other games where the MC's head is always out of frame, and I don't feel like that works either.
So the short answer is that I haven't decided yet!
There will, of course, be plenty of sex as things develop! :)