There isn't really a right or wrong, no matter what happens or what you decide, you'll "go with it" and raise your family the best way you can no matter your circumstances! There is no perfect time or perfect spacing - everyone's families work differently. If you think you're ready, then go ahead. If you think you're not, then wait. Lets say you decide to conceive right now and in 9 months time you have a newborn and an almost 2 year old -- then you will raise your family and learn to work with both of their schedules. I know several moms who have kids 9 months apart (not planned) and they just went with it :)
I don't know if you always *know* you're ready to have another child, we all have these thoughts and ideas about life which all get thrown out the window when life actually hits, lol.
We have 4, they are 10, 8, 5, and 2. So #1 and #2 are 2 yrs and 3 months apart, #2 and #3 are 3 yrs and 3 months apart, and #3 and #4 are 3 yrs and 6 months apart. I did not plan the birth of #2 and remember feeling very guilty during my pregnancy. I felt like I was taking attention away from my oldest child and how could I love another child as much as I loved her. I really worried that it wasn't the right time. After my son was born, everything just fell into place. My oldest just LOVED the baby (in fact, she kept saying it was HER baby, lol) and she was very helpful and attentive with him. They were VERY, VERY close for many, many years! They were the best of friends!
We planned #3, but had to wait a bit b/c I was having feminine issues and wasn't *allowed* to conceive. When I was given the ok, we were pregnant in 2 months. In some ways it was nice to have the other ones a *bit* older to *help* with the baby and to be a bit indepedent on their own -- BUT now that they are 8 and 5, I really wish I had had them closer together. We waited a bit b/4 trying for #4 b/c we let our financial worries consume us and waited for the *right* time. So 3 and 4 are actually a little farther apart than I would like.
In my opinion, and this is just me. I would have liked to have had my kids closer together. The first two are spaced closer to how I would have liked. Not that that neccessarily means anything -- our family is the way it is and we function just fine, lol, but I would have like my boys to have more in common at their respective ages (the 8 yr old feels so much OLDER than the 5 and 2 year old of course). But they all love each other and are flexible with each others playing choices.
If I had them closer together, I think it would be easier to make the transition to "big kid" activties. Like the older 2 like to go to the skate park, it's a bit of a pain chasing the 2 year old around there, but we do it. Going to the pool would be a bit easier if the 2 yr old wasn't so hyper, lol. We have just recently been able to take all the kids to movies, but sometimes the 10 and 8 yr old get bored watching movies like Ice Age, etc but the younger 2 aren't quite ready for movies at the theater that aren't animated. The 2 and 5 yr old get bored at the bowling alley while their 10 yr old sister bowls in league, but the 10 and 8 year old don't mind watching their younger siblings (at the bowling alley) when dh and I have our league night. The younger 2 like story time at the library - but the older 2 get bored.
Anyhow -- like I said, I would have liked to have had all mine closer together so our transitions throught the different stages of their growing up would have been easier, BUT no matter what, they all love each other very much and are great friends with a vested interest in each others lives.
You can get advice from a million different stories and hear everyone's opinions, but no matter what, everyone's life/story/lifestyle is different and what works for some, doesn't work for others.
Just go with your heart and do whatever you think is best. No matter what you decide you will work with "what you've got" :)
Best wishes and God Bless!
--S. (Homeschooling mommy to 4 Little Texans - Mia 10, Vincent 8, Anthony 5 and Giovanni Leon 2)