The top 7 would always remain the same,with Bob Dylan being my most listened to artist by quite a distance(it's a good job he's got plenty of albums
)
Bob Dylan
The Beatles
Jimi Hendrix
Cream
Led Zeppelin
Black Sabbath
The Rolling Stones
The other 3 are bands that are relatively new to me,so I have been listening to a lot of them lately.
Pink Floyd
Radiohead
Jethro Tull
If I was asked this question in a years time,I would say the Grateful Dead would make it onto the bottom 3 list as I'm waiting for several of their albums(and a few boots) coming in the post,so I will probably spend a lot of time listening to them in the following months,so far I have been pretty impressed with what I've heard.