The sartorial compass points in the direction of a notch lapel more often than not, particularly on two-button jackets.
The 'everyday lapel', distinguishable by a triangle cut where it meets the collar, is poised to carry you from the office to the bar to that restaurant you like, but never to the door of a black tie event. We often say if you only own one suit... buy another. If that fails, make it a notch lapel.