Okay, here goes.
So, imagine you can write yourself into Twin Peaks as a new character, at any point in either season, as anyone you like. What's your role? Who do you mingle with? What plot are you involved in, if any? Are you basically yourself, or would you change something about the way you look, act, etc? Just run wild with it, there's no "rules"....
Personally, i'd just be me, but i would be a biker (i have a leather jacket at home!). Maybe an acquaintance of Bobby Briggs, not necessarily a friend, so it would make it less awkward when i dive in and sweep Shelley off her feet whilst Leo is a vegetable and Bobby is in cahoots with Ben Horne. It would be a secret of course.
Maybe i'd have known Laura, and have some secrets of my own to keep. Maybe, akin to Harold, i would have been someone independent of her circle of friends that she found she could have confided in. I'd have known about Bob, and about all her relationship strifes. And you bet your sweet ass i'd be a bookhouse boy too. I'd know James quite well, and possibly tell him to get his feckin' act together.
Haha, obviously i wouldn't be a VITAL character, but i like the idea of the Shelley bit.....