why some live dealers seem way more attentive than others

noticed sometimes dealers seem super locked in, actually making eye contact and catching stuff like accidental double clicks, while others look kinda zoned out and barely say anything. not sure if it's just shift timing or if certain tables get more training or something. sometimes i wonder if tipping makes any difference or if that even matters on crypto sites where there's barely any live chat.

anyone else notice this? is it just random who you get or are there ways to spot when you're about to get a good one?