Hillary.
It’s not much of a choice, but yes, I’d prefer President Hillary.
I also think she’d have been easier to run against. For one, the press would have been furious at her for denying the Golden Boy the Dem nomination, so McCain occasionally would have been able to attack her without the press screeching. And for another, I think she’d have helped mobilize the Rep base.
But it’s irrelevant now.
It's better the devil you know...