My Dachshund/Pomeranian mix, Loki, has some weird ones.

All the other dogs we've ever had have been scared of the Vacuum. Noooot Loki. He tries to ATTACK it.

... The front of the vacuum is covered in teeth marks now.

His favorite spot in the whole house is the arm of the stuffed rocking chair beside the big windows in the living room. He loves to flop on there, stick his head through the blinds, and watch/woof at people walking past our front yard.

He's also taught himself a trick that we only just realized today. Whenever we're about to leave, we tell him "Bye-bye!" He immediately takes off to his spot on the rocking chair to watch us leave through the window.

A final quirk: Loki is a champion chewer. Thankfully through careful use of that 'no chew' spray, we've managed to get him to only chew what we give him, and the sticks outside. We learned very quickly that we can not give him bully sticks (those sticks made for pit bulls to chew on).

He went through two jumbo ones IN A WEEK.

So, what fun/silly/unique quirks do your dogs have?