The only negative I find at the moment is a preceived lack of time to get out there and be active...I'm up at 6 ready to travel to work and don't get home until almost 7pm then try and spend some time with my son before bed. I then feel guilty for wanting to head out and abandon my wife and daughter again.
I used to have a job where a group of us would run at lunchtime and that was certainly a beneift. My current job involves international travel, and some of the places I'm not sure I would feel comfortable running on the streets.
I've got to get back into it though as my son (5) and I did a mini tri on holiday in France, and the following morning he did three of them back to back so I am keen to encourage him as he gets older as he loved it.
Really need the weight loss from the extra activity too...the international cuisine is letting me down.