Supposedly the Pinterest founders are working on the issue of being able to move your pins around on one board (that drives me crazy too!)
I love Pinterest - it not only gives me a place to "collect" ideas and images - but I also love looking at all of the beautiful, unusual, funny, etc. "stuff" - its also a place where I can express myself creatively - making up new boards and deciding how to categorize things. Its just fun - I don't spend a whole lot of time actually "thinking" about it - I just "do" it!
I also love the fact that I can follow people from all over the world and get a glimpse of their lives, perspective, thoughts, etc. etc.
One thing that I like about it is that when I see something that tickles my fancy, I can "save" it by pinning it and then later go back and decide if its something I really do want to "save" for later - or what it is about it that got my attention, etc. - its something that I do a LOT with fashion and styles.
Here's my pinterest address: http://pinterest.com/mmillsmargesson/
I love following people and love having people follow me! Its just fun!
We (the organization that I volunteer for - an animal rescue group) does Pinterest and its great the amount of free publicity we get through it and the amount of activity we get at our local animal shelter because of things people saw on our pinterest board.