How much is too much?

[Kosmos992k]

I play probably 15-20 hours a week. Sometimes less.

Always means there is something to do when I log in and I don't particularly want to burn out again.

Good advice. I tend to skip a day or two during the week, and play another game on other occasions to break things up. Definitely prevents burnout. But then there are times when I will 'binge' and play maybe 8-12 hours a day if I am off work sick or something.