I couldn't agree more. I used to spend a couple of hours a day at this "job." Now it's like all day, every day -- but I still love it. It's better than getting up every morning and fighting commuter traffic to go to a dull job with an idiot boss, and waiting for the next 1% salary raise.
I've seen clicks from one of my sites range from $0.25 to $3.xx. I know part of this is due to the topic that is covered on that particular page. Also, there is "time of day" that must be factored in. As the day goes on, adsense daily budgets run out so the lower and lower $$ ad's start showing up on the site. There are a variety of reasons that a click doesn't give $xx.00 and instead results in $00.xx. Just keep pumping traffic to your site and the $ will grow in both quantity of clicks (of course) but also the value of clicks.
I've once tested certain keyword I thougt would pay much and got really surprised, it did pay well 3,40$ gor a single click But it is very sad when you get like 0,1$ per click... p.l.u.r.