Adam was most sweet and likable before [spoiler]Nicholas got a hold over him and started twisting his mind. Adam was quite vulnerable in his love for Carolyn and you can't help but ache for the poor guy when Carolyn is unable to feel as strongly about him as he did for her.[/spoiler]
The Adam story, while certainly not the best DS storyline (and I don't blame anyone for not liking it), it still held enough interest to keep me tuning in.