I have had the pleasure of talking with some very talented bowyers over the decades. Bamboo, is very popular among the longbows, but not all bamboo is created equal and the best bowyers have specific bamboo they use. Yew has been popular with a lot of bowyers, but many do not like messing with it, do to health reasons. I have been told by a few great bowyers that maple is a great core wood and I can say from experiencing it, that to me couldn't tell a difference. In the end, it is the core wood you like, as majority of the performance is from the fiberglass.