I'm scratching my head at all the people who answered "both." :blink:
Everyone spends time indoors and out because of necessity, so your answer should depend on what environment you associate the most with having fun and finding entertainment. If you like both equally and can't make up your mind sure both is a legit answer but 60% can't make up their minds, that's nuts!
With that said I'm an outdoor person. I love swimming, camping, nature, hiking, biking, adventuring, sunbathing. For a severe otaku, I sure do like to be outside a lot