What seems like a difficult baby will pass in time, and then there will be different challenges that pop up- I wouldn't base my decision whether or not to have a second bub in whether or not the first was a difficult baby. If you can, it is great for kids to have a sibbling, in my experience. Although I am sure only kids are happy too, I am just speaking from my own experience They can all be challenging at times. My first was active, into everything, disliked the pram and car seat and was difficult to settle during the day, which made it very difficult when number 2 came along only 17 months later. But, now, I have had 3, and whilst there are still difficult days, I try and take it in my stride, and I wouldn't change a thing. My active, unsettled baby is now a gorgeous 6 year old doing well at school and is a very nice person all round Good luck!