Personally, I'm going insane with my job. I'm supposed to be a sys admin, but after automating 90% of my work I'm a glorified helpdesk worker. The first couple of years were fun for me because I had a massive pile of shit to fix, but now it's no good.
Unfortunately, my external debts make a requirement that I have to stick at this job (I'd love to just blow them off, but wife and all of that). I can't find anything posted in my region that pays as well, I don't have enough saved to move (and no, that's not something likely to happen soon).
So, obviously for me it's cash and a new pile of shit to work on.
What would get you to move to a new job?