I don't know if others feel this, but having kids also makes for some complicated matters of self reflection.
If you plan on being a good parent, take whatever part of you is unique to you, that you self identify with, and realize that a big part of that is going to die off. You will no longer be LT Bear. You will be LT Bear in charge of his family. It changes you - in a good way. Your identity is now family man and Dad, first and foremost. There is room for other stuff if you keep healthy boundaries but it's very hard to keep healthy boundaries. This transition is wonderful, and eventually you likely will find yourself totally embracing it. There is nothing more rewarding (and challenging and difficult) than parenting children. It is the best thing I've ever done and at the end of the day my purpose on this planet is going to be to produce two other people that hopefully can help make this a better place.
However, I've been Baboon the Dad for 12 years now. And my oldest just started middle school and my youngest is 9 and more mature than he is. And I find they don't really need me as much as they used to, sometimes hardly at all. I used to be up at school all the time doing stuff and it gave me great joy. Now I'm just kinda lost. There are days they don't really even think to talk to me other than if they need something.
Childhood is sacred. You spend your entire life reminiscing about how much fun it was to be a child with no responsibilities. I see this in my 12 year old as he gets older. I remember feeling it myself. I STILL feel it. There are great times ahead for a 12 year old - perhaps girlfriends, college, Senior Trips, whatever. But nothing will ever be like childhood. Ever. It's sad.
I never thought about what it was going to be like to see that childhood ending in my kids, and I never thought about what it was going to be like for me, either. I am still Dad first, but I have a lot more time on my hands and I don't really know who I am anymore.