I'm not really sure, because the funerals that I've been to were religious, Jewish ceremonies. I guess that in my opinion, a "nice" funeral is one where the clergyman's manner is respectful and doesn't seem redundant (like he says the same for every person, even if he does) and that he seems to care about the family too. I remember I really appreciated the kindness of the rabbi and funeral home employees when my grandparents had passed away.