Well, I would take whatever role needs to be filled and get the game going. However, my preferred position would to be an adventurer.

I have a concept for...
[b]The Explorer:[/b] Indifferent and complicated, but very clever. While fame or glory are certainly incentive to him, something deeper drives his motivation. But who knows, he keeps his cards close to his chest.

[b]The Navigator:[/b] He is a dangerous person, but not for the reasons you think. He doesn't play by the rules, which might just be what this party needs since so many other expeditions have ended in failure. He is loyal to his word, but that's about it.

[b]The Adventurer: [/b]A young dreamer obsessed with learning magic (and failing.) She is full of spite and perhaps madness, she has never quit in her life. Fortunately to the expedition, her focus drives her to the desert, the river, and the challenges that lie in between. While a great motivation to continue pressing forward... what happens if the group must turn back?

I am a very adaptable player, so I am willing to take on whatever compliments the rest of the group or gets the game running and keeps it alive.