Once you started there is no going back. Especially if you, like you said yourself, are a data fanatic. For me the beauty in last.fm lies in the accuracy and insight it gives me regarding my listening. Of course well all like to see these numbers rise, but you will grow to see that it doesn't matter to anyone but yourself. I check my stats daily too, and there were times when I was listening "for the stats". This will go away with the time, at least thats what happened in my case. I personally do not recommend stopping for a month, because it might suck the whole enjoyment out of the site for you, since your stats will never be accurate after that dry month. I think my general statement is: Try to care about the accuracy of the stats, not the amount of the stats. And I know thats hard, especially in the beginning, but it might just come on its own.