in my opinion , it is good to keep a slight smile on your face , but not give a smile for every person you meet.

Yeah, of course I do. I have a nice story about it. I was sitting in a café, waiting for someone and there was an old lady reading a newspaper next to me, she was alone. She was looking at me and I smiled at her. In a few minutes she stood up and asked me if she could sit at my table and I said yes, why not? She was a talktive lady, she told me many things about her life and I enjoyed her conversation until the person I was waiting for arrived (too late) and I felt the old lady didn't feel alone for some minutes. :) It is not bad give smiles at strangers sometimes.. I usually do with old people and kids. You can make them feel much better with your smile. :D

no cause i am not sure if they like other smiling at them. cowboy...

sometimes yes !! =)

That depends on what feelings I'v got from the guy who is smiling to me