I fiddled around with art for about 10 years before finding collage and realizing this was MY medium. They're like hidden pictures for adults; even I get mesmerized by looking for all the gems embedded in the finished works!
I use repurposed paper from innumerable sources - old textbooks, vintage letters, children's books, maps, etc. The large bear below is 4 feet by 4 feet and took me about 40 hours to complete. I started selling them about a year ago. So far, I've mostly done wildlife, though I've done one landscape and a couple of pets. I plan on expanding in time!
More info: cewhiteart.com