I'm currently making $100/month between a couple of affiliate marketing efforts and a couple adsense sites. All of the above were put up months or even years ago and haven't been touched. If I stopped doing all IM-related activities today, I'd continue to make $100 of my $100 each month until who-knows-when. I'm making $0 based on projects I am actively working on.
From ratio perspective, this seems perfect: all my income is passive. Of course, the fact that it's only $100 and that I'm not making money on anything recent is rather...depressing.
What about you?