A couple of thoughts on the Tauntauns today - The existing close-ups really need some of your excellent 'eye blinks' to bring the too 'animatronic'-looking eyes to life. This would really improve matters.
On the first reveal of Luke's Tauntaun's left eye as it turns round during Luke's conversation with Han via his glove communicator, just as he says "Right, I'll see you shortly", a brief quick blink or eye turn (reacting to Luke) inserted here before it's current, eventual slow eye-shut would be good.
The shot when Han gets on his Tauntaun to search for Luke saying"Then I'll see you in hell" needs a quick blink too, and yet another quick blink would help when Han gets off it to search for Luke, as the Tauntaun faces us with it's cold breath.
And finally, it would be nice if Han's Tauntaun SLOWLY closed it's eyes JUST before, or AS, it keels over.