I am NOT a collector, so I really don't like buying a theme album, and Neil Young is the same thing, you buy a theme album and end up only liking 2 or 3 songs on the entire album, just seems like a huge waste of money.
So I have Neil Young's Greatest Hits, and I like every single track on that record.
I know that is sacrilege to most of you what I just said, but I'm not a collector, I just want to listen and enjoy all of what they had to offer, or at least most of the music on a single recording. I do own some theme-produced albums from other musicians but again I'm not collecting, and it just so happens that I might like most of the tracks on a particular record, for example, I have Robin Trower's Bridge of Sighs, the entire album is fantastic, so I don't completely shy away from theme albums, just depends on how many tracks I like on a particular album vs getting a best of album.