I don't get nerd-righteous about too many things, but when I do it's usually about spelling. Wookiee has two es, it's Lucasfilm not LucasFilm or LucasFilms, and for pity's sake Spider-Man has a hyphen.
I don't get serious about the pronunciation of the name of the fearsome dragon in The Hobbit, but some people do. So, I wrote a thing to help people remember the correct pronunciation of Smaug and the wonderful Thom Zahler drew it for me:
Click to enlarge
PS: This isn't meant to nerd shame anyone. I just thought it was a funny idea.