The most annoying things my dog does is:
•Begs
•Falls down the stairs
•Sleeps on the stairs (which usually results into him tumbling down them again)

All of these annoy me because when he begs he is so concentrated on you. And it's like WTF man. His constant falling down the stairs frightens me for his life. His constant sleeping on the stairs almost kills everyone else due to the fact that he blends in EXTREMEMLY well with the wood on the stairs and on the floor. It would be easy to step on his little ass and with his fluffy tail and slide right back down the stairs just like he does.