hi,
i have flown 2 time eco and 10 time business last and this year.
i everytime say hello to the people when i arrive at my seat.
in business mostly the people are business people, older than me, so if i get a friendly hello, i start a small chat after the first snacks. mostly the response is ok, and i had often even an exchange of business cards, and 2 times where this hello lead to a business.
but sometimes there are people with this DARTH VADER aura sitting next to me, so i give a hello and as i can hear from the hello they throw back , it is better not to disturb them, than i shut up .
i mean , beeing on a flight 12hours or more sometimes, i think some talking is a nice thing to get the flight shorter.
so if i have darthvader near me, i go to the FAs and start nerving them

which indeed brought me 2 dates . but this is another story. ...