I have several but never bought them intending to do it the PL way. I use them as journal cards or accessories to my layouts. I love the 3D look of scrapping and will always do my albums that way. and yes I have way too many of them as well!!!
Yes, like Tamara I use several for journaling or layers on a regular scrapbook page. I do have some PL (sorta) type albums I do, too - I mix regular pages with PL pages