Obviously I don't know how much you make, but it sounds like you've got your shit down. Isn't it nice to have passive income like that where you don't have to monitor every keyword and click all hours of the day to make sure you're ROI is in the black. I can't think of a better way to make money than to have sites on set & forget, while you work on the next batch.
Yep Its awesome... I haven't even quit my day job because I enjoy it too..
But its the fruit of all my hard work I have been doing for the past 5 years or so when I discovered blogging lol? Quit blogging and started creating SEO centric webpages pages instead
One the set and forget, what I have noticed is I always feel like spending more time on the best performing sites and I keep working on them..
I have so many 10 page sites that I don't even monitor. My excuse is that they are aging

and my foundation for when I quit my day job lol.
PS: I actively run a few campaigns on facebook, but somehow I love building bigger sites than monitor campaigns.
I do run some campaigns on facebook for fan pages to my sites.. even though referral to my sites from fan pages are minimal
And I run adwords campaigns for some link building.. This has been the best use of adwords for me lol..
I do contract work, not AM or MFA sites. I sold off 99% of all my sites and communities. So yea, adsense is not my source of income.
Contract work for corporates?
This is something I am thinking of going into. Plus SEM/PPC management for small businesses.
I just don't have a concrete plan to do it in an organized way...
But that would have to be something If i went full time.