I like the theme. Everything matches. I just think that as a supporter you can do a bit more with the background perhaps or even create gradient bars for the tabs (like the VM / About Me / Statistics / etc). Otherwise I'm a sucker for a grayscale theme. They're always classy.
Seeing that Zayn Malik pic all over that profile makes me know that if it ever participated in a Prettiest Profile Contest, it would absolutely trounce the rest of the competition, unless if one voter hated One Direction. Definitely the best-looking profile I've ever seen on PC.
I like it, not an MLP fan but that's not my reason for 8/10. Everyone likes their own thing and I won't let that affect my score. I think, however, that the brownish color you're using could match the MLP character a bit better. Try using a eye dropper tool in some photoshop-esque program to get the exact hex code color to match. It looks darker than I think it should be. Other than that I like it. :]
The colors remind me of mountains for some reason, perhaps the color scheme. Anyway, it's really good! I like the border style you use, it's unique and it works. Colors are good to and it's pretty clean.