I prefer the old fashioned hetero sex personally. Never was a big fan of futa or yuri for that matter. So I kind of agree with mill. But it's not really a bad thing either, yuri and futa I mean.
For me it all depends on the individual pic. Same with loli stuff. I've seen just as much terrible futa/yuri/rape/loli/etc as I have good. So I can't really say a preference.