Even though I am no longer in my 20's (or 40's for that matter!), I love to do things like zip-lining and parasailing.
While I might be somewhat adventurous, I am not into extreme sports. Some people enjoy the thrill of doing something that is death-defying or dangerous, like scaling Mt. Everest or mountain biking on the side of a cliff. They like the adventure, and the thrill or rush it gives.
Being a child of God can be the same way if you want it to be.
It can be boring if you never step out in faith or grow at all in your walk with Him---sitting on your pew week after week, doing "religion" by rote. It can also be unexciting if you get in a religious rut and stay involved in the same ministries, never asking if God wants you to...