I didn't extend my stay because I had already bought some tickets to a festival a couple days after the planned return from the trip. Otherwise, I probably would have stuck around for a week or so.
I don't know if the group I was with was just too young for me but I found all the Canadians really complain-y. And conversations were mostly high school level drama that just annoyed me. Good thing we had the Israeli soldiers around. They were like... real people. Lot of fun to hang out with :)