"I hate with a passion when the waiter asks me, "Would you like to try our ________?"
Amateurs try to upsell after a guest has already made up their minds. Then it comes off as desperate. You plant the seed when you introduce yourself, even before you show up to take the drink order. Otherwise the opportunity is over.
"Likewise, I don't like hovering."
If you keep your eyes open and are attentive to the guest's physical cues you don't have to hover. A lot of waiters hover because if they don't then their managers might ask them to clean something.