You STILL know you're a Monkey Island fan when:
At your sister's 15th birthday party, you blow up several balloons, draw Guybrush on one and Lechuck on another, with two of their 'famous' catch phrases (LeChuck's being 'yargh!'), parade them round the room making them have a pretendy voodoo doll fight with Guybrush eventually winning until you realise you have not made Elaine yet so the story cannot continue.
Then you take your balloons up to each family member and ask them if your drawings are good, eventually signing the balloons as if they are masterpieces and considering them fanart for the MI games.
so...urm... anyone done that?