My daughter will be 4 next month and I couldn't be happier with being a parent. Have things changed? Without a doubt! Before we had her I hunted everything that moved. I rarely missed a day of deer season here in CA. Now I pretty much stick to deer, coyotes and turkeys. My wife is the best when it comes to my hunting. She pretty much gives up everything from the end of August through October for the CA deer season and I don't push my luck during the rest of the year.(unless I draw a good tag out of state) It truely is the compromise between us that makes it work.
Embrace the change and I will be a great experience!