Exercising Outdoors vs Indoors

Here is an article about how there are studies being down that seem to point to the idea that exercising in the outdoors is better for you than hitting the gym.  They say that it not only revitalizes you more, but it helps your brain decompress more than being indoors or in an urban setting.  Head to the poll and let me know where YOU like to work out.  I know that I would prefer to workout outside, but obviously weather can be factor and also the fact that I'd prefer to workout before the sun comes up and I'm not completely comfortable walking around in the dark alone!