This is not an easy question.
For some coloured work my preference is Sycamore for scorched and Gilded I prefer Ash.
For bud vases Yew is my favorite.
for natural work Spalted Beech,Chestnut,Oak Elm.
Coloured Hollow Forms Sycamore.
Plain Hollow Forms Ash or Spalted Beech.
For teaching Sycamore or Beech.
Most disliked:Any Exotics,Holly.
Regards George