An interesting article from Nielsen compares the kinds of advertising Baby Boomers and Millennials (also called Gen Y) respond to. According to Nielsen:
Baby Boomers: Nielsen research finds that Boomers prefer clever, light-hearted humor (rather than mean-spirited) and relatable characters who are Boomers themselves or not much younger.
Millennials: Millennials prefer off-beat, sarcastic and slapstick humor. Like Boomers, they respond to characters that are relatable to them and their life stage. Highly arresting visuals (special effects, unexpected visual elements) will best capture their attention.
They also have a chart showing brain differences between the two age cohorts.
I was going to make several light-hearted yet sarcastic comments on this chart, but I got distracted.