[quote=Tyki]
*she* and i avoided giving her a personality in order to be able to change it as the story progresses, and she'd migrate to expand her hoarde... also, don't talk to me about her being generic. you literally said they were the generic dragons -_-
[/quote]

The orcs are generic orcs as well, but that doesn't mean they don't have personalities and motivations. The high elves are generic elves, but they don't all look the same. Just because the race is bland and generic does not mean the character must also be bland and generic. In fact, I'm sure a creative mind such as yours would be capable of creating an incredibly interesting and detailed character with many ideas and hooks for dramatic tension.
In any case, if you're expanding your hoard, then that's a bit generic and boring. You'd just fly over a small village and take all their stuff, and keep raiding villages until the generic spiky-haired hero came along and stabbed you in the face repeatedly. In any case, I'm going to, as I've done with the other Bio's, suggest some more ideas to this basic and generic goal, add a little bit more flavor.
So I suggest that your dragon is after a very specific artifact. This could be an artifact of great arcane power, or it could be an incredibly valuable gem. It could even be an item of great political value, depending on how much of an interest your dragon has in the going-ons of the bipedal races. In any case, this artifact is unique, and your dragon wishes to retrieve it. The problem is that you're not entirely sure where it is, and how to acquire it, which has led you to be forced to track it down.
Alternatively, you could be tracking an incredibly dangerous "hero". Dragon slaying is a popular and heroic activity, as the general idea of dragons is that they'd big, scary and dangerous. This person could be a renowned dragon slayer, having killed many of your kin, perhaps even having faced you personally and left some form of scar to remember him by. However, it could also be a figure of political or arcana power who was involved in some form of tragic event involving the slaughter of your people, likely for material gain. This person would be hard to track down and harder to kill, and would force you to face or work with the other characters.