I find a great deal of conceptual art frankly boring - it has a simple idea, puts if forward and then what? it isn't sustaining. Concept alone isn't sufficient, skill and wit and something worth saying all matter - this applies to traditional, contemporary and conceptual work.
I haven't seen anything by Tracy Emin or Damien Hirst that I like.
One that I love is Richard Long - his work has depth, skill, wit and a wonderful sense of place, of belonging where it is placed.
I don't agree that shed boat shed needed a lot of imagination - just a lot of hype and spin