I love to look at them, but I just started making my own. They are fun but take a lot of time. I do however find that I get a lot of thank you's from the shops I feature.
I found this treasury with over 3000 views but for some reason I think it will never make the FP. The sad thing is I think there could be lots more "handmade" items that could fill dozens of treasuries like this. Have a look before Etsy pulls it down. http://www.etsy.com/treasury/MTU0NTkzNjV8MjM5Nzg2MzY3Mg/simply-unique?index=1
I make them when I my to do list is small. I try to do a "Guess the Book" using the treasury items as clues. I wanted to do one every day so I could have that time to explore Etsy. But I got busy with a zillion things. I'm hoping to get back at it this week.
I haven't made one in a long time. I liked it better back when you had to wait for the treasuries to open and try and grab a spot - it was a lot more exciting that way. It used to take me at least an hour to make one.