I travelled back from Delhi to Bangalore by train recently. My co-passenger was a lady who described how and why she took a doctorate in Hindi literature...and how she decided that she would marry a medical doctor (she did so).
The coach attendant was a young man who described how financial pressure made him take on a job as a catering hey-you on the Indian Railways; twelve years later, his job is still "temporary", but his description of it, and the people HE meets, was fascinating!
On a training program recently, I met someone disabled by polio, who found a career where, he said, his disability would not matter...he is a deep-sea diver. He told me about submarine life-forms off the coasts of South America.
So...the contact may be the brief, odd dash of pepper, or the sustained, staple rice-and-buttermilk...I find almost all people interesting, sometimes, even the ones I dislike, as I try to analyse why I find them nasty. :D