I feel like teenages have ruined all of my past favourite things... I used to love Pirates, I watched Muppets Treasure Island all the freaking time as a kid. Then Johnny Depp and his screaming fans ruined it... I also loved Vampires, like old school vampires... Even the first Underworld film was quite good... But here comes Twilight to turn Vampires into the worst thing in the world... Now I'm utterly sick of Zombies too, for the same reason Barry mentioned, so over played and turned into this cheesy teen fad thing.
Aliens are hanging on, teenage girls still haven't found a way to ruin them.
Still I'd take a good Zombie film over most alien invasion films... But I think space travel Sci fi (with or without aliens) is generally better. I watched Interstellar recently and loved it. And I love the Alien series.