Stargate is amazing because it has less tension and is lighthearted, but can also pull off heavy and tense moments every now and then. The lightheartedness of it contrasts to and makes the more serious parts more interesting.
While I do love BSG, there were practically no light moments in the show. Every time they…

It's perfectly fine to have moral lessons as long as it doesn't interfere with the story. BSG is an excellent example of a story that had moral lessons that did not feel like cheese spread on top of butter on top of ice cream. The characters in there are sometimes gay, and that's just that.
Doctor Who is a show that…

What would be the worst thing is if this whole master=>missy thing turns out to have been solely to please the LGBT crowd and the next episode is a cheesy "we should all accept each other and hold hands and be hippies and skip through the fields".
We had more than enough of that with Smith's run.