The Office is one of the most well crafted series I've ever seen. No episode lacks a purpose, especially when viewed in the overall story arc of the series and no episode lacks a laugh, an awkward joke, a scene you will remember or a moment where you can feel for a character, at least for me.
Even though from that it might not sound funny, it really is, but when it comes down to it is about much more than laughter. This is a series about peoples' lives, their pains, their loves, their dreams, their jobs, or in short, life.
Life in an Office. See it.