In terms of the more realistic workspace dynamic, then the big bang theory, but the show doesn't really centre around the workspace that much like the office does. But in terms of which I enjoy more, then definitely the office.
The Office’s depiction of a workplace might not be as realistic as the depiction in TBBT but I wouldn’t value “realism” anyways. The Office‘s exaggerated depiction leads to a much more interesting and intriguing perspective on work in modern society.