Oh yeah, and I also agree on the adrenaline rush thing. I think sports of any sort can provide that 'rush' that we are after. I play tennis and am always looking to improve my game and get that little mental boost from playing well (and kicking the butt of my opponent!) I also do yoga and have found that, too, can be athletic and edgy. You can push the boundaries a bit there in the right studio/location both in terms of the challenges, the cool music, etc. Martial Arts, cycling and skiing have always interested me as well. There is hope!