The Aquarium: good, but none too big and dominated by the shark tube. They have something similar at Brighton (I think it was), so I felt a bit miffed at the cost, which was high. A little disappointing - the Berlin one was better, and so was Copenhagen for involvement.
Egyptology: Excellent - good price, good content and a lovely visit. The stuff was not as big as the museums in London (British Museum) or Vienna (Altes Kunstmuseum I think) but good quality and well presented.
La Pedrera: Probably the best presented of all the Gaudi things. I'd probably recommend going there first and then deciding which of the other places you wanted to go to. I'd still have ventured to exactly the same places, but it would have been good to know more about Park Guell for example.
The Roy Liechtenstein statue near the harbour
The Columbus memorial: the commentary makes a singularly facetious point that it is the biggest such monument in the world. Like that matters. They then get a bit snippy and say that if he's supposed to be pointing at the New World then he's pointing the wrong way. My response is that if he pointed inland (i.e. the right way) then it would look more ridiculous than pointing out to sea. It's great.
The roof of La Pedrera (this means 'quarry' by the way)
The model of La Pedrera inside the building itself
I am off to France tomorrow where I shall not be doing much. I doubt I'll have internet either for a bit, but I'll try to stay in touch. If not, I'll be back online in Moscow... And very cold.