We prefer natural/conversational sentences. While phonetic diversity and different words in sentences is important, we are trying to make recording sentences as much fun as possible. Therefore it would be great if you could try to keep your sentences as natural/engaging as possible.
我们更喜欢自然/对话式的句子。虽然语音多样性和句子中的不同词汇很重要，但我们努力让记录句子的过程尽可能的有趣。因此，如果您能尽量保持句子自然/吸引人，那就再好不过了。