Personally, though, I dislike them. Often they add nothing to my understanding or enjoyment of the chapter, and at times seem utterly random and irrelevant even as I finish the chapter and flip back to reread the quote at the beginning.
So put them in if you like--but only if they genuinely enhance or illuminate
I can't put it any better myself so I'm just quoting...
However, I often put quotes at the beginning of my books but I do make sure they're relevant! These quotes, while relevant, I always feel are a bit of a vanity on my part - they mean something to me, I feel they're important but if readers skip over them then they'll miss nothing! I also have the occasional tendency to put song titles in my chapter names.