The first time you make a WordPress site it may be a bit tricky for you. If you are not very well versed in PHP and MySQL this site can be all but downright confusing to you. Taking it slow and learning to tap into the functionality of WordPress is ideal however and will immensely benefit you in future sites, therefore you should really consider tapping into it for one site at least to see how it benefits you.
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.