Theme Sites. These are of course thematic, which will be helpful on what theme you want to use in a page. Scrapbooking is like Wordpress. If you are making a website powered by Wordpress, you will look for nice themes that you can work on instead creating your own. It should be appropriate in the long run as you post and update it. In scrapbooking, templates will stick for a long time after some time of adding all the elements, and it will be the basis of the overall look that you can't change. Photo Sharing Sites. These sites are both theme and group sites at the same time. Photo sharing is mostly their goal, but I have seen scrappers post their layouts or projects. So you will get templates or their ideas as well.
Of course, the reason why you would like your memories to be mounted to a scrapbook instead of a photo album, is because you would like it to be special as much as possible. When you create a scrapbook of your own, you do not have limitations in adding as much creativity as you want, unlike photo albums, you are entailed to use only the spaces that are allotted for pictures. And since photo albums are ready made, it's difficult to make a personal touch for your own preference.