I have "hosted," so to speak, a fair number of funerals because my father was ordained. I notice that people ate more at funerals than they did at weddings so eating seems to be a big "funeral activity." Therefore, what kind of food is served might be the biggest consideration.
I saw a horrifying amount of crass conduct at funerals, such as someone who asked the widow, in very sympathetic tone, if she had been left well-provided for and then actually asked her if he could call her so that she could "have some company during this difficult time." In other words, he was looking for some "company" with a woman who had just come into some serious money. That is just one of the reason I am a little cynical about emotional displays at funerals.
Yet I have seen some customs that I did find a little charming. At a Swedish funeral, I saw that the hats of the family of the deceased were color-coded to reveal their relationship to the deceased. One color for the wife, another for their daughter, and on like that.