iTunes is completely hopeless for organising music.
iTunes has no consistency is labeling and categorising music in the player itself. For example, take the Delirious album World Service. Tracks 1-11 are by Delirious, track 12 is by Delirious and Daniel Bedingfield. If I am looking through my Delirious music on iTunes, this song is missing! It's filed under a different artist ('Delirious and Daniel Bedingfield'). Therefore I am unable to browse my Delirious collection satisfactorily (especially as Delirious have worked with several different artists, giving multiple Delirious entries in iTunes).
This problem is particularly exacerbated in film soundtracks, such as The Lord of the Rings - composed by Howard Shore, but using a total of 11 solo artists over the three soundtracks. Therefore I cannot see or play the three albums together, as they are filed under 12 different artists!
It seems to me that iTunes is aimed at listeners who generally want to listen to one track at a time and then find a different track to listen to, or listeners who only use playlists, or listeners who are happy to put their entire music collection on random.
I fit into none of these categories. For me, the best experiences of music are when I listen to a complete album, and this is the thing that iTunes is useless for.