I'm not a huge fan of working with the rectangle pages myself, but I do love to ocasionally do an 8x8 album. I'm glad you found out that you like it--that's the good thing about experimenting--sometimes you find something new!
I scrap almost exclusively in 2-pg 8.5x11 layouts. I have fun with the occasional square layout but since I am more wedded to 2-pg layouts than I am to the aspect ratio of my layouts, I find it easier to fill 2 8.5x11 pages than 2 12x12 pages. I did a couple of 8x8 albums but I found those pages to be too small to do more than 1 photo per page. I'm pretty sure I'll do 8x8 if I ever want to do a whole album of 1-photo layouts.
Oh thanks for showing/posting these albums. I scrapbook "my" babies from work...and I always use the 8.5 X 11 for them...cause I just don't get that many pics from most families...but I want them each to have a very special page in my books. So this is an EXCELLENT size for that.
I've been thinking about doing 8.5 x 11, but I've been kinda scared to since I've only done square before. I don't like 12 x 12- too big! Actually, Page Maps has a lot of great sketches for 8.5 x 11. I often find myself looking for a square sketch, but I keep finding myself drawn to the rectangles... must be a sign!