I used to be a bikee in the army and it was probably my greatest
experience in the army, especially during overseas exercise riding
up and down the mountains in Taiwan with the clouds in your face,
the wind in your hair, and the great sense of freedom on a
bike...... ahh.....quite an indescribable feeling. 
We ( my bikee gang ) always talk about having the best experiences
and also worst experiences riding the bike.
So ya that's my opinion. Riding gives the most shiok feeling but
also threatens ur life the most.