I've been making a nice income from SEO in 2011 and the beginning of 2012, but I never went back when I lost all of my rankings and I found it to be very unstable.
I haven't looked at SEO for a long time now...
1) How much different is it?
2) Is it easier? Harder?
3) Is it more/less predictable?
4) Why are you doing / not doing SEO?