Alexander,
As the parent of an only child, I can't say that I've experienced your life. And it IS hard work.
One thing I notice with your "pull string doll" comment is that you have a sense of humor. I think all people considering having kids should have a "humor IQ" test. Because being able to laugh is what saves you.
Don't know how old your little ones are, but I noticed a kind of roller coaster with mine: cute baby needing feeding and changing (and love), but adorable. Toddler running around, putting things in mouth, needing to be watched all the time. Early school years: enthusiastic, loving learning new things. Middle school years: emotional, moody. Etc., etc., etc.
I think you'll find in the end that it was very worth it. And it helps to talk about it. Just knowing people hear and understand what you are going through helps.
