An introvert will always understand the importance of space and alone time because they are so self-sufficient. The introvert needs time alone to unwind, to recharge, to clear their minds and when you need the same they will understand and respect your wishes and never take offense.
The concept of working a 9-5 job in an office can be daunting for introverts. We like to work independently, follow our own schedules, and we tend to kind-of-really-dislike being around people all day long. But we gotta pay that rent, right?