I like Morena. She's not a bad actress in everything else she's been in she does a really good job. I think the 'blank'-ness you're referring to in this, is how she's chosen to portray the character. Inara is a classy lady, with poise for days and she tries not to let emotion cloud her judgement.
I have to agree with you about the chemistry thing, though. Her and Fillion have no sizzle on screen.

You ribbin us, bro?
Say, do you hear that? It's the sound of the Reaper..

I loved her. I read somewhere that her wardrobe was based on Natalie Portman/ Padme's from Star Wars, and I have come to think that her character is what Padme
should
have been (minus the companion angle of course). Her quiet strength and reserve is perfect. She seems older and wiser than her years. I didn't actually hate Padme the way some did, but I wish we'd gotten to know her better. I feel like we know Inara despite not having her entire backstory. She might even be my favorite of the entire cast, but they are all so great it's really impossible to choose just one.

Found the village cow.
Hama cheez ba-Beer behtar meshawad!

Inara wasn't meant to be played over emotionally. She was hiding a big secret which was implied in Serenity.
I loved Morena playing her!

Well there was a very good reason for her being the way she was. Inara was dying and we would have learned that later on.
I thought they had great chemistry, Inara just held back because she already knew she was terminally ill.
Yo momma

This message has been deleted.

Go watch her in Deadpool. She traded perverse snark with Ryan Reynolds shot for shot.
Inara was supposed to have a certain degree of serenity (no pun intended) about her.

Others can see you're missing. Mal and Inara have incredible chemistry. Everyone knows they're madly in loveexcept that they can't admit it to themselves.
How sad there are those who can't see it. Oh, well. It takes all kinds.
Great white sharks are attracted to death metal music.

I came to Firefly because I love Nathan in Castle. And I have to agree on the chemistry thing at least. Being used to watch Nathans/Castles chemistry with Stana Katic/Beckett on Castle, I was dissapointed with the lack of romantic chemistry with Inara/Morena too.

You realize not all tits sag, and there are many bigger than an "A" cup that are perky!
Wasn't me

Not everyone likes big saggy tits.
I joined the Navy to see the world, only to discover the world is 2/3 water!

Tit's, WTF, are you mental, she is tall and skinny, pretty woman, but she's lacking in that department!
Wasn't me

People like her in Homeland because of the tits.

Everyone has a right to an opinion. So do you.
That does not mean your opinion is correct.
Persisting in your opinion as though it is an objective fact
Just proves you to be an ass.
I joined the Navy to see the world, only to discover the world is 2/3 water!

Not at all. Tears, smiles, grins, wide-eyed, laughter.

She was just speaking the lines that suggested those emotions. Her face expressed either or an irritating smile.

Sadness, fear, regret, disappointment, insight, bewilderment, joy.

What specifically was she emoting?

I have yet to see her emote anything on here or Homeland.
I have: Serenity, Shindig, Our Mrs. Reynolds, Trash, Heart of Gold, Objects in Space.
Can't stop the signal.

So are you trying to say Morena wasn't blank? I have yet to see her emote anything on here or Homeland.

Had the show continued, she would have to be written out.
Not at all. Everyone loved Inara and Morena.
There're only so many close-ups of her blank expression one can take!
Never!
Can't stop the signal.