Custom fonts, images that look nice on retina / hdpi screens, complex responsive layouts can all add up. Images are obviously the worst offender, but the rest all contribute.
Of course, aesthetics are a matter of subjectivity, so what is pleasing to one might be gaudy or bare to another. It is largely a matter of picking your audience, I think.
Of course, aesthetics are a matter of subjectivity, so what is pleasing to one might be gaudy or bare to another. It is largely a matter of picking your audience, I think.