I opted to use 8 1/2 x 11 pages for my 2007 scrapbook. I usually use 12 x 12 but I had an extra scrapbook that was sized for 8 1/2 x 11 so I thought I should use it.
I vary the size of scrapbooks depending on what the topic is. I did the kid's school days scrapbooks with 6x6. I really love the 8 1/2 x 8 1/2 book that Stampin' Up! is now offering. You have a lot to choose from, so don't be intimidated by a 12 x 12 scrapbook page!