I like this topic. For me, it would be somewhat of a combination of Jessie, Lillie, and Gary.
Jessie because, like her, I have an independent and determined personality and admittedly can have a short temper too at times.
Lillie especially because of her quiet demeanor. If she wants something, she at times will act unsure of herself at first but persevere due to determination.
Gary (well Johto and Sinnoh Gary that is) because he's always by himself and while he has friends seems to prefer his own company. That's how I am. Plus, he also seems to be the kind of character that's not easily persuaded. And on top of that, him wanting to be a Pokémon researcher relates to me wanting to go into a research related field (sociology for me).