I know I look like a gnome. But I'm not really a gnome. I'm a goblin. I know that every time you look at me your eyes scream "gnome," but just humor me and pretend I'm green with pointy ears. It's not my fault that the game didn't design goblins as a playable race! I refuse to play any of the races they provided, because I just don't feel like it. Because I don't feel like it, I'm going to make you work extra hard to ignore what your eyes are telling you, just to make me happy. Because I'm just that special!
I watched a lot of soap operas growing up. I don't feel like making up a backstory, or else I don't want my character to be held accountable for his/her past actions, or else I have some kind of extra-special seeecret in my past that the world just isn't ready for yet. Not only don't I have any memory, but my entire life revolves around the fact that I have no memory. Thinking of changing the subject from my tragic lack of memory? Think again! I'll remind you incessantly, because if there's one thing I can remember, it's that I can't remember things. Oh, and by the way, it is up to you to help me recover my memory, even though we've only just met. Because I'm just that special!
...someone really important. Never mind the fact that nowhere in recorded history does it mention that royal figure/hero/god having any offspring - that's just because no one knows about me! Soon I will reclaim my lost heritage and thus prove my superiority over all these "lesser" heroes (including you)... because I'm just that special!
...something really exotic, sexy, or dangerous. Never mind that nothing in recorded history mentions that such a cross is even possible. Never mind that I seem to look just exactly like a familiar full-bred race that is common to this world. I assure you that even though you have never before seen a peculiar mongrel such as myself, and even though I look remarkably similar to you, I am not a boring fullbred like you. I have exotic ancestry that doesn't show. Because I'm just that special!
...something really evil and/or dangerous. Because I've reformed, I expect you to treat me just as you would any normal person, and to pay no mind to the fact that I've slaughtered innocents, stolen, raped, performed human sacrifices, et cetera. I will probably relapse periodically, too, by the way. When I'm done being evil, though, you should instantly forgive me and your character should hang out with mine again, because I have "reformed" again. I know you'd never hang out with anyone else who has a history of violent and/or criminal behavior, but you should with me, because I'm just that special!
Get out of my way, because I'm someone important. I have connections you don't. Because I'm just that special.
I am hunted by my own kind, or possibly by some powerful person or supernatural being. My life revolves around my need to flee and to stay hidden, because They Are After Me. Your life should probably revolve around this too, because if we linger here talking too long about your problems or your goals, They might find me and catch up to me. Why me? Why are they after me and not you? You ought to know this one by now... because I'm just that special!