While I don't like open casket at the actual funeral service, I do like to go when there is a visitation, or as they say "viewing". For me there is a certain amount of closure in doing so. I was with my dad when he passed away, and so didn't want to go, nor thought I needed to go, to the visitation. But I felt after it was all over that I wished I had gone. I know it is not for everyone, but to me, especially if it is somebody close to me, I have this need.
Some will say "I don't want to remember them that way", or "that will be how I always remember them". I understand for some it is that way, but that is not the way it is for me. I remember my loved ones in a variety of ways and mental pictures, and that is only one of them.
I recently attended a funeral (and have been to others) where the casket was open up front until the service started. I guess this was their way of allowing others to have this opportunity. It didn't bother me, but my hubby kept his eyes down the whole time. But it wasn't open for the whole service. Personally I prefer it not to be open for the entire service.
I personally wouldn't take pictures, nor would I want anyone taking pictures of me when I am dead. But again, I understand that for some, especially those whose "tradition" it is to do so . . . or as they used to say "to send to family in the old country" . . . that this is a particular kind of need. I don't think as much as what they used to. I remember as a child seeing pictures at my granny's house of some of her family in caskets.