I've got a 19-month-old son. Early on, I worried, wondering if I'd have the emotional maturity to responsibly take care of him, but it never ceases to amaze me at how much I can love someone that at one point, not too long ago, never even existed. Early on, babies are actually REALLY easy to take care of! They sleep the majority of the day, and they usually only cry when they need something, which is either going to be a bottle, a diaper change, some attention, or a nap. As my son got older, it rarely got confusing as to what he needed, and he's to the point now where he'll be talking at any moment. He already mocks our talking, in his own babble language, so it's just a matter of time and interaction.
Many people I know who have kids always say, "Once they start talking, you'll wish they didn't!" I'm actually looking forward to my son's random chatter, and I hope he asks questions about a lot of things. I have a lot of fun just being silly with him. He and I can have fun with something as simple as his Spongebob bounce-ball. He laughs and cracks up when I throw it to him, or bop him with it, and he throws it right back at me, or throws it onto me when I'm laying down. He giggles so much that it gets me crackin' up to the point of tears. He had me in tears the other day when he figured out how to snap his mommy's shoulder-strap from her top, making her yelp, and he kept doing it while she let him, and he couldn't stop laughing! It's adorable and hilarious, but I hope he doesn't develop into a little bully!
As far as future children, the jury's still up on that one. My wife is so content with how good our son is, that she doesn't wanna "jinx" it with having another one. She can't picture another child being as perfect as he is. I wouldn't mind having a daughter, but the practical side of me wants to make sure we can physically provide for the one we have before attempting another, and I'd prefer to at least wait until my little man's in school.