I can only answer from my own experience, your life is probably different from mine, so keep that in mind when you read
Yes, life changes dramatically when you get children, but for me it was definately worth it. I had to let go of some of my precious hobbies and spare time, but I got a lot of other things back for it. A happy smiling child that loves me, greet me with small kisses and waves goodbye to me. And I know that when the kid(s) is grown up, you get back that time, and then you can relax again. Theres a time for everything, and you have to find out if it is the time for you to have children yourself.

Hugs, Charlie