Funny. I didn't list my copy of Parliaments Tear the Roof Off 1974-1980, as it's a compilation. The thing is, I got to know it as a complete - end to end album. So to me it still works, even though it's a greatest hits. It contains most of the Mothership Connection album, anyway. It's the same with my Waterboys Greatest Hits. If that's the only album you've heard, it can become a complete, end to end listen (if it's done right). A good Greatest Hits album can also tell a complete story, IMHO. I have to agree on the Bonus tracks on the Bowie albums. As soon as I ripped the Bowie CDs onto my hard drive, I deleted those 'Bonus' tracks. I really didn't like them being there. They seemed so out of place.
I have that compilation too, it could definitely make this list, but Mothership Connection makes my list for songs like Handcuffs, Unfunky UFO, and Night of the Thumpasaurus Peoples, i.e. the songs that don't make a greatest hits compilation.
I don't have a problem as such with greatest hits or mixtapes. An individual album makes an artistic statement by arranging and presenting a certain set of tunes in a certain order. A compilation or a mix is the same thing except done by someone other than the original artist.
Sometimes i put my whole Amazon library on shuffle, but there are certain songs that just belong together.
I don't mind bonus tracks if they tack them on at the end.