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.
N’é ciù cao e frase naturale addeuviæ inta conversaçion.  Sciben che a diverscitæ fonetica e a presensa de poule despæge inte frase en di fattoî importanti, voemmo çercâ de rende a registraçion o ciù piaxeive e demoante che se peu. Donca o megio saieiva se e frase che ti azzonzi fïsan o ciù naturale e entuxasmante che ti peu.