I might lack the nuance to pick up differences, but American suburbs are remarkably consistent across the country. All the new 'inner' tech cities (Austin, Atlanta, Phoenix, Boulder), used to be University towns.... so they were deep blue even before us tech yuppies moved in.
I've found Americans to be rather welcoming everywhere I have gone. If anything, Seattle has been my 'least welcoming' experience so far.
Is the abortion issue that big of a factor in moving decisions ? Other than a few headlines, I doesn't seem to be particularly difficult to take an out of state visit if the need arises.
I can understand the urban density or nature as good reasons....but I find that those most opposed to the move rarely give either as reasons. (I might be projecting based on a few similar anecdotes I've been on the listening end of)
All other things being equal, people normally like to live in an area where local government look after their people. Or at the very least, don't actively write legislation that is designed to harm you for no compelling reason.