Yes, there is an edge of insanity to all of this, but I'm loving the entire project. I'm so far in, I think a part of me has forgotten that I really can just pick up my Kindle and buy a book with it. Leave it to me to completely ignore the aspect of it that Amazon thinks is the point of the thing. But then, that's really not unexpected with me.
I did notice I was getting headaches that started about the same time I got the Kindle. That concerned me, because I specifically chose eink to avoid that issue. After a few days I realized it wasn't from the Kindle - it was from the hours I was spending on MobileRead, book sites, using Calibre... They went away once I settled down some and actually starting READING on my ereader.
I do find I watch less TV these days. I guess that's something.