Sycamore Wood: The sycamore makes a questing wand, eager for new experience and losing brilliance if engaged in mundane activities. It is a quirk of these handsome wands that they may combust if allowed to become ‘bored,’ and many witches and wizards, settling down into middle age, are disconcerted to find their trusty wand bursting into flame in their hand as they ask it, one more time, to fetch their slippers. As may be deduced, the sycamore’s ideal owner is curious, vital and adventurous, and when paired with such an owner, it demonstrates a capacity to learn and adapt that earns it a rightful place among the world’s most highly-prized wand woods.
Unicorn Core: Unicorn hair generally produces the most consistent magic, and is least subject to fluctuations and blockages. Wands with unicorn cores are generally the most difficult to turn to the Dark Arts. They are the most faithful of all wands, and usually remain strongly attached to their first owner, irrespective of whether he or she was an accomplished witch or wizard.
Minor disadvantages of unicorn hair are that they do not make the most powerful wands (although the wand wood may compensate) and that they are prone to melancholy if seriously mishandled, meaning that the hair may ‘die’ and need replacing.
Wand flexibility or rigidity denotes the degree of adaptability and willingness to change possessed by the wand-and-owner pair - although, again, this factor ought not to be considered separately from the wand wood, core and length, nor of the owner’s life experience and style of magic, all of which will combine to make the wand in question unique.
Notes courtesy of: Mr. Garrick Ollivander, sole proprietor of Ollivander’s, “Makers of fine wands since 382 B.C.”