I have one!
I consider myself a multifandom/Whatever I Wanna Post blog.
It's a combination of fandoms and dolls and projects and things that make me laugh and occasionally some slightly social justicey things when they're done with a tone I like.
As far as the anon hate, I've never gotten it myself. I'm mostly active in the Young Justice fandom, and the most drama I've seen in there is hate for Lagoon Boy. I have seen some people I follow get some, but they're more the Tumblr Famous cosplayer sort of crowd, and they really handle it quite well, I think.
I try to stay far away from social justice issues for the most part. And politics. Like I said, when it's done in a way I like and in the tone I like (AKA: Not saying, "You have no heart if you don't reblog this!" because what I do or don't do on the internet does not reflect whether or not I have a heart), I'll reblog something to signal boost it. If it actually is something I care strongly about or actually have an opinion on I'll reblog stuff.
I hate the SJB, though. I refuse to be as politically correct as they tell people they should.
Really, to me Tumblr is just about finding your little niche where you fit in. I started mine because of another tumblr topic here a while I think. In 2010, because I remember it was my first year of college and I posted here and I can't find my post on that first page of this topic unless I'm blind. I started following people here because I had no clue how to find anyone else, but I quickly found out that I hated following them. No offense to anyone, I just found out that we don't have much in common outside of dolling and most non-doll posts annoyed me. So I abandoned tumblr for bit.
Then last year I got back on because my roommate got her's. I started reblogging some giveaways and not using it for much. Then she told me about one of those tumblr famous cosplayers I now follow because they liked Young Justice, and that was my introduction to the fandom side. And I loved it. It's where I fit in pretty nicely, so I mostly stick to the other nerds on tumblr while still posting other things. Like I said, I'm a Post Whatever The Hell I Want type of blog, although it is largely multi-fandom.