I have a 20-month-old. Honestly, for the first ~14 months of my son's life I felt... responsible for him, but any "love" was more of an abstract, theoretical thing than a real personal affinity. Babies -- my son, anyway -- under that age are just a black hole of time and attention that require everything from you and give nothing back.
But over the last six months or so, our relationship and my feelings have changed a great deal. On a practical level, he's able to entertain himself for longer periods of time without requiring my input. But more importantly, he's starting to understand and discover principles about the world. Seeing that process of discovery is incredibly fulfilling, and I can honestly say I love my son and enjoy spending time with him and engaging in that learning process, in a way I didn't during the first year.
His growing emotional repertoire is especially gratifying to see. We went out to see Christmas lights over the holidays, and as we passed one house with a particularly luminous display he pointed to it and exclaimed "WOOWW" with eyes full of awe and wonder. Rediscovering the beauty of the world through the eyes of a child is a sort of joy I've never before experienced.
(And don't let "teach them sign language" think you need to teach full on words. Basic signaling that is agreed between you and them is all I mean. Typically "want" and "hungry" are the only ones you need.)
Wow, this is a very strong point. It made me appreciate my parents very much, the way you worded this type of love. It is like the outpouring of love from one life to another. I hope I will be ready for this when I too one day have kids. Thank you!
Before you make any judgments about more kids, wait a year. I think your opinion might change.
I see stuff like this posted all the time when the topic of having babies comes up.
And it's why I don't have sympathy for parents that cry about not knowing how hard it was going to be. You're making an 18-year commitment! Do your research!