Didn't realize this crossover might be such a real and complex issue... personally I'm a Doom guy (obviously), but I believe it's more so just because that's the franchise/genre I just happened to get into first, not more so that it somehow matches my personality more. I could just as well have picked up idle RPG-like games and become addicted to those. Animal Crossing seems like fun too. Generally, I'd feel like gamers generally appreciate games. That's all.
And that two so very different franchises being renewed at the same time led to this creative bridge, which has then grown further as people fed on the hype and popularity. Surely the contrast makes it all the more fun to play around with too.
Maybe I place too little value in the community aspect of it all though... interesting theory to listen to too. Good stuff.
-cd-