What is the preferable to get from BCN airport to city center without paying expensive taxi fares?
If you are staying anywhere near Placa Catalunya, the blue Aerobus is very comfortable and not expensive. I think we paid 5.40 euro each. You will find the bus outside T1 and T2. It stops several times on the way in case one of these might work better---Placa Espana, and Universitat. We got off there.
THANK YOU!
You can also catch the train from T2 to Passieg de Garcia station and it is covered by the T10 Card.