The thing about Barcelona is that you will never have enough time. Try to plan less, get lost and explore the city without much of an agenda. You will find hidden markets, tiny cafes, delicious gelato, hidden bars and more. It is truly the perfect place to spend in early spring or fall - the temperatures are around 20 degrees, very walkable or well connected with transit. Also use Barlona as a starying point to explore more of Spain - there is a lot to explore.
