Eh, I rarely read either for sexual entertainment. But I occasionally do so, and I'm not too picky whether it's yuri or yaoi whenever I want some fap material. It's the art; if the doujinshi/manga is well drawn and has good art, I might find it a lot more appealing than some hardcore yaoi. Or yuri. Well drawn stuff just somehow turns me on. I guess it has something to do with my personality and stuff, but I never cared so much for porn in the first place. I've spent my time with it, that's for sure, but I never had time to grow picky with it. It might be well drawn abs, well drawn sexual organs or well drawn pretty much anything. As long as it's well drawn, and especial bonus points if the style somehow resembles paintings. I love oil color paintings and I would fill my apartment with them, had I got the money.
Now that I think of it, there might not even be a need for erotic content, or such. Okay, well drawn male bodies do turn me on, but I remember a couple of times I masturbated purely to some landscape thing, mainly because of I found it spectacularly beautiful.
In any case, I don't dislike yaoi, nor yuri. However, as I rarely read either for sexual entertainment, I may not be the best person to ask about this for.
I originally read a lot of yuri, and I still do. (Yeah my name in the replay uploader probably gives me out on this) While I do not find girls that much as a sexually arousing thing, I deeply enjoy the cuteness and emotion several more lighter yuri manga tend to have. I don't enjoy reading hardcore porn that much, since there is rarely a plot, and the amount of cuteness is lessened. Sex scenes within yuri don't make me drop the book, tho', since as long as the plot exists with some cuteness, I don't mind there being a bit of erotic content in the middle of it. However, I don't want to be the porn to be the main thing about the literature I read.
I started reading yaoi a bit after I got into yuri. Okay, I admit, I was a bit prejudic about yaoi in the first place, since there were a couple of yaoi fangirls in my school back then and I found them really annoying. I still find a lot of the general yaoi (and yuri) fangirls of the ages 13-17 rather annoying, with all their babbling and talk and Harry Potter slashes and such. However, I decided to experiment with yaoi a bit and see if the content itself was as bad as the fans. Turns out it wasn't.
I actually liked several yaoi manga with good plot, and there were a few with a deep meaning behind them. I found it awesome, and also found the sex scenes arousing for a reason I was not entirely sure about back then. The main reason for my reading of yaoi is cuteness as well, though it's a bit different than the yuri cuteness, it still is cuteness, and I do enjoy it.
I'm okay with homosexual pairings in the real life. It took a long way of understanding if it was normal or not, many nights spent crying why couldn't I just be like the others. Since I really don't like how the modern community and rising of children, not to mention media, encourages the "normality" of heterosexuality. But maybe I shouldn't get started on it.
I also would love to have Finland allow homosexual marriages. While I'm totally okay without it, having never really understood the church-system, I know some people who'd really love to have an actual wedding within a church. But Finland doesn't yet allow that, but hopefully it'll change. Same goes with the adoption rights, but the future is looking rather bright for those.