I've worked in the US and Canada for 20 years. I've never really cancelled a vacation, though at the senior level I've made a choice to delay one. It was a pers

I've worked in the US and Canada for 20 years. I've never really cancelled a vacation, though at the senior level I've made a choice to delay one. It was a personal choice, however. Sure, it was for the greater good of the project, but no one pressured me. In knowledge and creative work I find that if you take 4-5 weeks off a year (I've only done this once) work can bleed in to "off time" and it doesn't matter. When you take 2-3 weeks off a year you have to protect your personal time.