This is simply the best image Hubble has ever taken IMO, which is impressive given the competition. My favorite before this was one of the first, a close-up of The Eagle Nebula, a one light year tall region of star-forming, seen face on. That was amazing because for the first time we saw the three-dimensionality of these clouds. Very Inspiring.
The Carina Nebula, below, seems similar, but in this case it's from the perspective of being near the bottom of the cloud, looking up. Even more dimensionality! The Carina Nebula is 7500 light years away, and that cloud is 3 light years tall.
Well done, Hubble Scientists! Happy 20th.