If you have 2+ kids, how far a part are they age wise? Do you wish you would have had them closer/further a part?
If you have only 1 LO, how close do you want to have your kids together?!
We're thinking about trying for #2 in Aug/sept this year... that way they'd be 2-2 1/2 ish years apart.

Re: How far a part are you kiddos in age/what is your goal?
My kids are just under 6 years apart, and I want another less than 3 years younger than Logan.
Me: 37
DH: 36
Married: 08-25-07
DS: 11-20-09
Name change alert: Formerly Lisswastaken
My girls are 20 months apart and I love it. DS is 24 months younger than DD#2 and I have to admit it's harder. It would be fine if DD#2 was the oldest, but because of DD#1, she has grown up much faster than DD#1. When DD#2 was born, the house was still baby-proofed. We didn't have little tiny toys or birthday parties or anything that DD#2 couldn't have/do. By the time DD#2 was about 6 months old, the girls did everything together - yes, at different levels, but we could take both of them to the park and they could both play/swing/slid. We could take them to birthday parties and they'd both enjoy it. It's even more so now with them doing everything together - literally, everything. They're lost without one another. DS is starting to get to the same point where he can play with them. He gets all mad if we're downstairs with me cooking dinner or something and they're up playing without him. Last week, all three of them were playing with Little People (and fighting over them) and it was soooooooooooooo cute. It's hard...really hard especially once we threw a third into the mix. But I wouldn't want it any differently.
ETA - Just as an FYI for the 3 year age gap. For me and most of my friends, 3 is soooooooooooooooo much worse than 2. Two was cake compared to 3. Four has been pretty good, though DD#1 is a drama queen and I'm hearing great things about 5 from friends with older kids. DD#2 is getting close to 3 and we can already tell it's going to be really really tough.
my read shelf:
DD and DS1 are 25 months apart; DS1 and DS2 are 27.5 months apart. Basically the same spacing. I thought the transition from 1-2 was sooo easy, 2-3...not so much. The hardest part about have them 2 years apart is potty training while having an infant. I would have to set LO sometimes screaming while I rushed the older child to the potty. Luckily, LO couldn't get into everything (not mobile) while I was PTing. I also thought it was much easier to have a fall baby (for #2) rather than a winter baby (#3). I hated being stuck inside with a cabin fever toddler.
Mine are the best of friends and I can't imagine my older to without each other!! They are really closer despite being the opposite sex.
My advice is to keep the older child on their schedule and work baby around that. If you are nursing, have special toys/ TV time while feed baby. If things get to stressful, just get out of the house, even if its just to through the drive thru for coffee. It's okay if baby cries for a minute (or in the case of the third baby for like 10 mins!). The dishes & laundry will be there tomorrow. Keep everyone dry, feed, and remotely happy including yourself. It gets so much easier as they get older and entertain each other!
DS is 3 years older than DD. It's not a bad age difference, but I want my next one right around DD's 2nd birthday because we want 4 and I don't want DS to be too much older than #4.
Ours will be 12 months apart. I can't tell you yet how it is but, at this point, I am glad we are having them together... We won't have to "readjust" to baby mode. We have everything we need, we are used to making bottles and changing diapers and hopefully they'll be best friends.
At least for a few years. 
We're done at two!
Sam and Eli are nearly 21 months apart. We made it work at the time, but it was hard. I look at where Sam is today and think it would be infinitely easier to bring a newborn into the house. I can reason with Sam more today, he understands what is going on, he responds to "no" and "time outs." He is also potty-trained. I think for Sam and Eli, the 2.5-3 year age difference would have been ideal.
This differs from child to child, however. Sam has already done the terrible 2s. And yeah, they were terrible. He's so much better than he was even 3 months ago. Eli might skip the terrible 2s and go straight to terrible 3s. Who knows.
We are going to try for a 3rd, probably late summer next year. That will give us a 2.5 year age difference between Eli and baby #3. Hopefully that works out for us!
My girls are 5.5 years apart.
This is only because of secondary infertilty and not having a choice
I was shooting for a 4 year apart difference. Even though we didnt plan it this way, it definalty has some great advantages!! See post: https://tryingtohavebabyp.blogspot.com/2010/11/gap.html
If and a big *IF* we have another, I would like them to be no more than 3 years apart.
DD #1 {04-19-2004}
Secondary IF: Severe MFI (low testosterone, low count, low morph, & very low motility) & Annovulation
After 22 months IUI # 3 Clomid + Follistim = BFP
DD #2 {12-31-2009}
2 more years of failed IF treatments and a failed adoption TTC #3
TTC Journey Over~ Not By Choice
We have 11 months between DS1 and DD, and 20 months between DD and DS2 (31 months between #1 and 3).
I love having them all so close. They all get along great, and my oldest really looks out for his little brother and sister. But, like pp mentioned, 3 is way worse than 2. Right now, I have both a 3 and a 2 year old, plus the little guy is teething. It's been a bit rough the last few weeks, but it's just a phase. We're planning on one more, hopefully with about 20 months between the third and fourth.