I like gestures for the same reason I like keyboard shortcuts: you don't have to aim. There's a tradeoff in UIs: large number of targets with few actions, or large number of actions with few targets. An example of the former is a typical web page, where every link is a target and the only actions are open and open-in-tab. An example of the latter is vim, where there are only a couple targets (buffer and command bar) and every key is an action.