I use aluminum because I shoot low poundage bows and I have a 30" draw length. My arrows are cut 32" long. Carbon shafts for low poundage bows won't fit my long draw and my 32" long arrows since the right spined carbon shaft for me only come in 30" lengths. Secondly, I like the way aluminum spreads the overall weight out along the entire length of the arrow. This gives me a heavy arrow for a light poundage bow. With carbon, carbon is light in grains per inch. If I could find the right carbon length arrow, I would have to load up on the point weight. Carbon has it's place and is great for some, but not for me.

I don't care for wood since they're really not uniform enough in weight to suit me. One of my friends shoots wood arrows and there is a 10-20 grain difference in the same spined arrows he shoots. Wood can warp too.