Acknex became a problem for me, I spent way to much time writing code and not enough actually living. So when I bought my house about 4 years ago I gave it up completely (there was no middle ground for me).

This weekend I decided to play with it a little and got the same results, the day just slips away while I merrily code away locked in the house.
I was absolutely amazed how easy it was to sit down and start coding again.