Good to have you back. Taking a look at your pictures (and browsing all the ones you have tagged as "Barcelona") reminded me of a technique I sometimes use when visiting a new place: see what other people have tagged with the same place on Flickr (eg.
Barcelona) or use their map feature to explore visually.
It is a free, community-based way to get an advance glimpse and work out things you want to see, cliches you want to avoid and perhaps some lesser visited spots that you could contribute pictures of, improving the resource for future travellers.
Wulf