>>1588286I considered a cute folder in the past, but I always thought that it'd be the one final step to becoming a weaboo-forever-alone-faggot =P Once I start staring longingly at anime girls with no intention of sex, I've lost all hope of a real relationship.
As for the fapping folder, I started that because I realized early on I was VERY picky. I'd go through 100 pictures before I found a single one that I liked. It was miserable and made masturbating a 30-minute process (28 minutes of searching followed by 2 minutes of actual fap). So I started saving my favorites in case I was in a hurry.
Of course I've got a bit of a thing for cat/animal girls, so that's easily my biggest folder.