Jeff, Britta, and Troy are the characters that change the most, I think, throughout the first season. The writers didn't exactly know what to do with them, but as they made more episodes, they realized what worked, and the characters just click and become a lot better. I always liked Troy and Jeff, though, from the start.
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_foolmo_
'Illegal activities is a slight misnomer, most of it is not related to material that is actually illegal.' - nintendogrl1