A whole bunch of inception fandom blogs (i apologize in advance for how many people i’m inevitably going to leave out but this was all i could scrounge up off the top of my head!!!!! If you should be on here, shoot me an ask and I’ll add your tumblr to the list!)
Also, this is a personal plea from me to the rest of the fandom:consider putting your tumblr name on your AO3 profile page so we can more easily identify you across platforms! go to http://archiveofourown.org/users/[yourusername]/profile and click edit my profile! here’s what mine looks like as an example.