How close are you to your co-workers? Do you"shoot the shit" with them or mind your own business?
I like to maintain a "professional distance" but also don't want to be seen as the jerk who sits in the corner with noise-cancelling headphones on. I'll be cordial and say "Good Morning" and "How was your weekend"? But I won't go deep into my personal life because of bad experiences in the past at work with unfair judgements and gossip.
It seems alot of workplaces these days place more emphasis on the employee's "fit" at work rather than their actual skills. I e. being introverted in an extroverted work environment.