I was lucky enough to know out about the best, most entertaining night of Carnival in all of Cataluyna. In a small town called Torello, 86km from Barcelona, they have a unique night of Carnival where all the guys from the surrounding area dress up as girls. It's called Senyoretes. Spanish guys love dressing up as girls, so it was good. Really good.
Also, I got posted on the Vice Spain blog: http://www.viceland.com/blogs/es-photos/2011/03/21/senyoretes/