I was just reading Piffka's thread about going to the UK. (Looks great, and great thread!) I was struck by her comments about making it fun-packed.
I'm allergic to scheduled vacations. I like freeeeeeeeedom.

I lived in England for a while and then planned to travel in Europe afterwards. The idea was that E.G. and I could meet up at the end of that, and then travel together. He had lived in Paris a few years previously, knew it well, and preferred to see parts of Europe he hadn't yet been to, so we decided that I would see Paris by myself, he would then join me, and we'd both take the train to someplace in Portugal. (We'd originally planned on the Orient Express to Turkey, but was too much time and $$.)
So, we were standing in line at the train station, going over our jam-packe schedule ("OK, we'll get there at 5 PM, and then if we walk fast I'm pretty sure we'll be able to reach _____ before it closes...."), and looked at each other, and said this is so much trouble, why not just stay in Paris? I mean, PARIS! So we flounced out of that train station and had a lovely relaxed week or so in Paris doing whatever we dang well pleased, which often consisted of nothing in particular.
What kind of vacation do you like?