I have 11 Disney albums--1 each from most of our trips, and then 2 albums each from our Sept. 2006 trip (my 30th birthday) and our Sept. 2007 trip (where we took my parents). I have at least 2 more left to do--1 from Oct. 2005, and 1 or 2 from the trip we just finished last week. We have certain pics that we take EVERY time, but as others have said, the new embellishments or time of year themes change everything up a bit. Also, I am addicted to our swaps here, so I always have different stuff to use! Our next trip will probably be the first one with our little boy (due in August), so I know that will be at least 1 (probably 2) HUGE albums!
I've used albums that I found at WDW (both 3-ring and post-bound), albums I bought at JoAnn's or Target that are Disney, and also the CM Disney album. The CM Disney album is probably my favorite, but then I get to JoAnn's or somewhere, and I can't resist the allure of the bright colored ones with characters on them!