On the other hand, Aaron Carroll makes the excellent point that Barack Obama didn't do this by himself:
The more specific reason I don’t use “Obamacare” is that it implies that the law is the work of one man. It wasn’t passed by fiat. It was created by three committees in the House, two more in the Senate, was voted on by a majority of Representatives and a heck of a lot of Senators before being altered in reconciliation. Then it was signed by the President. President Obama neither gets all the blame nor all the credit. It’s not his and his alone.Ezra Klein has more, and singles out Max Baucus. Again, fair enough, but radically incomplete; if we're going to name this one for people, it's gonna have to be (in no particular order, and non-inclusive) KennedyObamaWaxmanDoddBaucusPelosiReidHarkinMillerRahmSchileroDeParlethousandsofactivistsdozensofinterestgroupsCare. Barring that, I've adopted ACA, because whatever the origin of the letters, calling it by the supremely bland "ACA" sounds about as neutral as one can get.