Yep, as far as I know, AR is fine with ppl headcanoning them as gay, or other sexual orientation. IIRC, this was her response re: Daniel and Marius:

Look at all my tags on that post, tho: #fandom    #mark hamill    #wish we had one of the IWTV actors saying this    #but I think theyd all agree w/ it    #your headcanon may vary    #ship and let ship    #gif    #quote    #headcanon    #lestat likes this    #you dont need the authors permission to think whatever u want about canon    #YOU DONT NEED AUTHORS PERMISSION FOR YOUR HEADCANON    #just be respectful    #of others’ headcanons too    #reyton    #roselioncourt    #pointed this out to me    #thank u  

I don’t really need the IWTV actors to say it, either. Just would have fit on my blog better 😉

For example, some ppl headcanon Gabrielle as transgender. I don’t, personally, but I’m respectful of their opinion. I don’t know what AR would think about that opinion, and I don’t reeeeeally care, bc you don’t need the author’s permission to think whatever you want about canon. Just be respectful of others’ headcanons, too *u*