I'd be far more likely to comment here than Tumblr. I never see anything there. I can scroll and scroll and find very little I want to see there. Their notification system is next to useless. One can tag someone's Tumblr but never gets more than a nano second to click on a notification before it is gone again. And it is far too cumbersome to try to guess which blogs among those I am following might have posted something interesting over the recent period.