My daughter has two "very annoying" dogs, a boxer and an american bull dog. Their ownders are busy young professionals, which should give a clue to the amount of quality time they are able to devote to their pets.
What you describe in previous post, is exactly how they respond to the annoying behaviors. And the annoying behaviors are reinforced.
What's amazing, is when they come to my house (grammy provides free dog sitting) they are much less annoying when their owners aren't around. I've kept them for week stretches and they behave fine for me, as soon as their parents arrive to pick them up, they start up with the annoying behaviors b/c they've been reinforced for so long. When they stay with me, instead of making them wait until I am ready to take them out to walk, feed them, play with them etc. I try to provide those needs on a routine schedule, when they need the attention.
Agree with Mikey T that this is very good advise:
"Just a you would not Ignore a crying baby, If you provide timely attention when requested the dog will become less "needy" over time."
Now the other interesting occurance was when Lucy(our basset) was still with us, she was only annoying if she didn't get her daily walk,which rarely happened. On those rare occasions, she would stalk us until we finally took her for the daily walk no matter what the weather(rain, sleet, snow, etc). By stalk I mean, get so close in following us we'd trip over her, whining, grabbing an item she knew she wasn't supposed to have, etc.; annoyances we couldn't ignore, and then she'd get her walk. But when her dog cousins and their parents (owners) came for visits, she participated in all their annoying behaviors, begging for food, barking etc. As soon as they would leave the house, her behavior returned to normal.
I've also observed that what may be annoying to one dog owner, is not annoying to another. Personally, I am annoyed by barking. Other people obvisouly are not annoyed by barking as there are certain dogs in the neighborhood that get tied out and bark all day!