I have mixed feelings, but have also been shocked at times, especially when I go to the US, to see people wearing shorts to church, for example. At the same time I understand the idea of "come as you are" as well. A friend used to awake at 5 AM to pray on the phone with a Lebanese friend. As she sat in her pajamas, one day she was surprised to learn that he dressed up in a suit, because... wasn't he entering God's presence?