The Eiffel Tower is nice when it's all lit up and you're watching it from in front of the Sacré-Coeur/Butte de Montmartre.  Other than that, I pretty much agree.

Though, I didn't have any expectations for Las Ramblas.  I don't think I'd even heard of it before I went there.

 Mostly, I think the thing that turns me off is the hordes of tourists.  Maybe go back when it's not high tourist season?