There are many places that you can go to to people watch
I love people watching!  I like to pick out a person and try to guess what his story is!  It's like a game to me!
Absolutely. We do not walk in a persons shoes. They may be famous, or down on their luck. Its quite an interesting experience.
It is extremely interesting, especially when eavesdropping is involved, though I don't like to do that too often, it can feel creepy sometimes!  LOL
Ever feel like the person KNOWS you are people watching them ? Thats a creepy experience in my mind as well.
I've had that happen!  I then try to look the other way!  haha!  One does have to be mindful of the Expectation of Privacy though.
Or you tell your partner NOT to point (at the person you picked out) and they do ! So embarassing. 
Oh I know!  Or be like "don't look" and they look!  LOL  I like to watch  body language and  expressions - it's so interesting to see!
Oh yes ! I can immediately tell if someone is mad at someone else, or if that person just has the 'I dont want to be here" look on their face. Amazing.
It is!  It really is a fun hobby for me - for others it's subconscious and they don't even realize they are doing it!  Where's the fun in that?!