For most shots, I use an open bridge as I can see the the shaft alignment better, it slides through the bridge easier, and I feel I have better control of the cueball because my stroke is smoother.
On very brisk shots, I switch to the close bridge because I think it stabilizes my stroke direction a little better (debatable, but I think there's some truth to it).
Sometimes on the harder hit draw shots, I will grip the cue too tightly and lift it up off the open bridge. This is very subtle and I don't notice it except for the resulting paucity of draw action. A closed bridge prevents this.
Having the cue jump off the ball doesn't really affect the shot and, imo, isn't a great reason, in and of itself, for using a closed bridge.
Jim