CO757,
At the risk of making this sound like a gripe, unless "May I get you something to drink before takeoff" is a personalized greeting, then the vast majority of Lead F/A's do not adhere to that policy.
Please don't get me wrong, I am a HUGE fan of CO and CO Employees. But whether it be a handshake or a simple "Thank you for flying with us today, please enjoy your stay in wherever" personally delivered to each passenger is one of the small touches that tells me that this particular employee really likes or loves thier job.
I would venture a guess that the longer the flight, the better the chances of the Lead or First Class F/A extending a personalized greeting to each FC pax. Could this be due to the fact that Long Haul F/A's have more seniority?
Anyway, I hope no offense is taken to this observation, I would not willingly switch airlines for any price!