You have a good memory. It is definitely true that I enjoy the idea because of its expression in Gandalf and others, but what really captures my interest is ascendancy. Growth, expansion, evolution, and, when necessary, revolution are all topics frequently in my mind. Wizards/shamans, as I understand them, accomplish these things through magic - expressing a will/mind capable of either deep cognitive reappraisal (i.e, transformative advice) or transcending tangible restraints to overcome obstacles (fireballs for nasty goblinses, Thee-Shall-Not-Passes for angry Balrogs, invisibility for anxious escapes, and so on). The malleability of magic strongly appeals to me, I think, because I tend to view life and its contents through a similarly shifting lens. I suspect being a Ni-dominant is partially to blame for all of this, but I digress.
I did know that Tolkien popularized "dwarves", but did not know that it was considered erroneous, for the same reason. Language itself fascinates me as the iteration of possibility unfettered (within reason), the manipulation and recombination of symbols that turn into thoughts that turn into tangible products like, say, poetry and the atomic bomb. (That the two came from the same source - imagination - never ceases to amuse me.) The English language, however, is rather weird and I don't know how natives learn it the first go around. I had the benefit of learning it alongside Russian and French when young, else I might not have learned it at all.