Barcelona and Spain as a whole is an amazing place. It's one of the few places I really could see myself living and enjoying. You've got relaxation, nightlife and good food in literally every city! Hopefully I'll be going back this Winter since there are cheap tickets from Boston. Also that beach is one of my favorites in the world when it comes to hanging out(there's better beaches for photos).
Indeed, you get all the best things of Spain. I loved Andalusia as well. I hope you find ticket for this winter :D