ANNOYANCE: It's really hard to play just one song

If your search doesn't match exactly one song you basically need to make a one-song playlist for it.

ANNOYANCE: Poor search box cancel behaviour

If you accidentally type your search string into a playlist (manual or automatic), then realise that you need to do a search on the entire library, clicking on library deletes your search string!

FAQ: How can I remove the iTunes store links?

$ defaults write com.apple.itunes show-store-arrow-links -bool FALSE

FAQ: How can I change the iTunes store links into within-library searches?

$ defaults write com.apple.iTunes invertStoreLinks -bool TRUE

FAQ: How can I remove the genre panel?

$ defaults write com.apple.itunes show-genre-when-browsing  -bool FALSE