I like using aspen in my snake enclosures, makes cleaning up so easy. It is harder to maintain humidity, so I have a corner with sphagnum moss that's always kept moist to maintain humidity. I love the stuff! Not the most appealing to the eyes but I think it looks better than newspaper or papertowels. What I want to try next is cypress mulch.
Keeper of 5 snakes, leopard geckos, 1 green iguana, 20+ tarantulas, 2 dogs & a bunch of rats!