I like when they're like "water, cold" and it just makes a cylinder of water that splashes onto the bottom of the replicator because they forgot to specify that the water should be in a cup. Imagine programming them on purpose this way just to fuck with all the foreign dignitaries.
It was funny when that happened in an episode of VOY when Janeway ordered a coffee, and then the mug materialized a few seconds later because the replicators were malfunctioning.