I'm quite into the Endorfins/Adrenaline too since I found out my dog realy likes running in the dunes (and swimming in the ponds there)..
Love to go out in the dunes on my bike.. Dog running beside me..
Got to have good breaks thoug.. My cheap blocks tend to overheat sometimes in descent..
I don't realy like to cycle long distances.. Or for speed.. But the dunes (and woods) I do like..

Also reading.. The only problem is it doesn't allways interact well with other drugs..

Am now sipping a weird cocktail my wife made..
Something with Apple and lemon brandy and 7up..
Also smoking some class A Ketama Gold (hashish).