Sometimes, however, you present your concepts, and the client says: "Damn. That's awesome." and you know you're in for some fun.
This one worked like that. I was asked to do a poster for a classical music recital - specifically, a recital which was a partial requirement for a Masters in conducting. I settled on a 1960s thriller/drama movie poster aesthetic, some garishly bright colours, hand-rendered type and illustration, a slight homage to Saul Bass, and a wacky title.
Some of the rejected taglines were "He always strikes... IN TIME" (my favourite), "You're Out of Time", "Always in Time", "Strike in Time" and "It's the Fucking Vortex of Doom".