I used cypress mulch in most of my cages for the longest. I like it alot. I buy the Forest Floor from the pet store. I find it much cleaner with less big shards and chunks that I got when I got the garden store variety.
Just this past week I changed my mulch into a mixture of cypress mulch, repti bark, and eco earth. I try to keep naturalistic cages and I absolutely love how the mix looks. It still holds moisture well but looks much more natural. I just mix is in a large tub until it looks like I want it to. I use what I need and the rest stays in the tub until I need it. When that time comes I will add water, mix, and use.