See I like gay jokes, I can quite happily sit through episodes of House and Sherlock Holmes and make lots of gay jokes, only mine are funny and way way less obvious.

Also its not a subtext with Who, its more hammering the point home with the TARDIS mallet every single week (though it is less so than with Torchwood). By no means do I have a problem with gay issues in the media, but seriously Star Trek managed to cover a whole range of social issues with out referring to the same one so heavily every week.