AFAIK also muslims prefer squating over sitting as it's the suggested practice, also they don't pee standing up (I think this is due to health reasons as well but can be about being clean,not sure).
I always prefer squating over sitting however when you get old generally you need to sit as squatting is literally requires effort, many elderly people sits due to this.
I can't imagine squating in a normal sit toilet, that's just dangerous.