NOTICE: This question falls into the FAQ page...
What type of questions can't be answered by Vocaloid Wiki
Questions on Personal (issues / opinions / feedback) about Vocaloid series/products
Thus this would depend on one's definition of "beautiful". So unless specified, this question could be about avatars, voices, or names.
edited 12/12/12 : Users can now make a poll to gather votes for such questions. However, please create a separate page.