I'm always the black sheep on this subject.
most pros prefer to run it twice, I'm in the minority and hate it.
Why?
I believe that if players know that you are willing to run it twice, then it incentivizes them to shove on you. They can shove on you and realize that fold equity and when you fold they win. But then when you call, they get an extra shot (i.e. run it twice) to hit their draw.
If you did an EV calc on that, it would then become INSANELY profitable to shove semibluffs against players you know are willing to run it twice.
Also, with my style of play I utilize fold equity a lot, and so I would lose fold equity if my villains knew I'd run it twice.
So for me personally, running it twice is no bueno