Personally, I boil life down to two options: 1 or 0? Yes or no...Do or Do not...and on with the cliches.
Either you're going to take an action or you're not. After you make the choice, there is no point in worrying about the paths not taken cause you can't undo your choice.
Life all boils down to "yes" or "no", all that makes it seem like it doesn't is the justificational hoops we jump through while trying to make the pick.
I agree, I mean it is logical and true it is basically "yes" or "no," but those hoops are killer sometimes.
I really enjoy Eugenio Montale and he has a passage in one of his poems in Cuttlefish Bones where he wrote:
I walked the road in one direction, while my heart
yearned for the other; and maybe
I needed the knife that slices through,
the mind that decides and determines.
As for regrets? No. But it is the yearning where choices are concerned that I find fascinating, and difficult emotionally. I need that knife.