I didn't think I had any maternal instinct because I was never interested in other people's kids, and I HATED for someone to hand me their baby without asking, just assuming I wanted to hold it. I didn't. I REALLY didn't.
But when I had my own, I was very aware of the fact that they would only be babies for the blink of an eye, and I didn't want to let other people hold them. Of course I did, sometimes. But I wanted to make sure I got to spend as much time holding them as possible, before they were too big and too independent.
I guess I was lucky that my kids were both kind of low key - and still are - and we have always had a quiet home environment. My husband was also good about getting up with them at night a lot of the time, because he knows I need more sleep than he does.
It is hard being a parent. Now that my kids are older, it's easy to forget how hard it was sometimes. I had a really hard time, as an INFP, dealing with other parents. I was never into the "play date" thing because I had zero desire to spend time with other mothers. But my kids did go to day care, and I didn't ever mind having their friends over to our house. So I don't feel like my introversion kept them from anything.
I have always been interested in making sure my kids have a variety of experiences - traveling, going to plays and museums, reading books, etc. I also read to them a lot. It's fun sharing the world with people to whom it is totally new, who are not yet jaded and cynical. It's a nice way to rediscover the good things about the world for yourself, when you see them through the eyes of your child.