Research into album covers

As we looked through various examples of album covers that are being used in the current music industry we noticed that the vast majority (obviously with a few exceptions) used a main image  juxtaposition to the name of the artist and album. 

Nirvana's album cover for 'nevermind' has a baby underwater centralised with the name of the band (Nirvana) in the bottom left of the album and the name of the album (nevermind) is in a flowing font to link it to the background which is obviously underwater. The album cover is very random, as it shows a one dollar bill on a hook as almost bate for the baby, the general attitude of the cover lets the audience know that it is of a rock/indie genre.