Thinking about new options.
Read an interesting post on hybrid publishing models (between self-publishing and traditional - read the comments on this one, btw...that's important), which isn't new, but part of the ever-changing face of publishing. I love opportunity and out-of-the-box thinking, so change excites me. That said...
The uncertainty of the unknown.
There's risk involved with change and out-of-the-box thinking. Not that that will stop me. Heck, I wouldn't be an agent if it did! But I absolutely have to weigh career benefits and big-picture for my authors, too; they aren't Guinea pigs. No author should be.