dummaque, please remember to anonymise links
I've corrected it for you.
I've been to Sitges, it was a few years ago, and went twice. It was extremely gay friendly - well it's probably better to ask if it was straight friendly
You'll meet every nationality, every age group, every shape & size. You can have as much or as little fun as you wish
Made some nice friends while I was there, I know I'm quite open anyway, but it's certainly easy to meet people and make friends.
Be prepared never to sleep, well that goes for any holiday in Spain