sure thats true, but one can make some very general observations, i know when i was starting out i would have loved a list like this- just a nice kick off point- while you are trying to learn so many other things.
hickory- really good backing-pretty reasonable belly, but not ideal.
tough forgiving of mistakes and bad tiller.
tough-ish to scrape and sand. susceptable to moisture
ipe- excellent belly-on a crowned belly, it needs perfect taper, otherwise it will chrysall. i make mine all flat bows. makes for very slim light bows- easy to carry all day.
ash - nice and easy to work with, takes a fair amount of set( very general observation!!)
ok. to good as a backing.
osage- the best of everything- hard hitting and snappy- easy to work with- nice colour etc etc
i am sure many others will throw in their comments.
wayne