I think the coffe shop scene also manifested a Vito characteristic. He was like the shark that is supremely confident in his abilities and his intentions, and with little or no trepidation. If you recount the scenes where Vito dealt with others it is with that same confidence and fearlessness. And that confidence and fearlessness permitted Vito a little narcissism. The novel explains it better than I. Vito liked to, in a sense, drag things out. For example, he could have told Bonasera yes or no. But he enjoyed maneuvering people into a position of dependence, supplication, or misapprehension. he also could have told Sollozz yes or no over the phone or by messenger or whatever. But he enjoyed the joust, the performance.