I have just walked in the door having got back from Barcelona. The worst aspects of the holiday were:
The Brits in Barcelona
British people in Barcelona
Behaviour of British People in Barcelona
The fact that it took us an hour and three quarters to go from the airport to the hotel (but only 20 minutes to return)
That after the rain on Sunday afternoon the sun came out so I was on the beach (and paddling in the sea) in my t-shirt and knickers, while my bikini and sun-hat were back in the hotel.
That I ended up feeling embarrassed about being British because pretty much all the loutish and/or rude behaviour I witnessed came from Brits (most of them with an arrogant attitude of superiority)
Er, that's it. The good bits were very very good. We had a good meal on Friday evening, and really truly excellent meals on Saturday and Sunday lunchtimes. It did rain from time to time, but mainly when we were indoors. Die Walküre was wonderful (notwithstanding some strange tempi etc from the conductor) and it was fun outside the Opera House afterwards. We took over a hundred photos inside and outside the house. Some of them may appear here in due course!