I have voted for pro choice candidates before. 

My 2 primary reasons are personal and ideological. 

Personal: the ACA has turned out to be a nightmare for my family. Left to itself, the ACA would have bankrupted us. The private sector came to the rescue and prevented that. In the case of my SIL, a prominent neurologist with a substantial clinic (it's almost a mini hospital!) is treating him for free. The only thing he has to pay is that stupid IRS fine, which is but a fraction of what the ACA premiums and copays are. 

Ideological: going all the way back to the Serbian conflict, Clinton is a proven and established hawk and warmonger. My opinion on this is not based on any MSM news source, my opinion is based on conversations with "boots on the ground". 

That's it in a nutshell. With Hillary, we knew what we were getting (though no one here wanted to address her history of warmongering). With Trump, we are getting a blank canvas yet to be painted. I'll take the blank canvas.