Hiya, well as you say there really is no right or wrong answer. There is 2 yrs and 10 months between my two boys they are nearly 6 and 9 now. I didn't want them too close as didn't want the double buggy situation etc, just my personal choice, we just used baby pram and toddler buggy if going into large cities etc, to save on tired legs and just to know he was safe and could sleep whenever. Obviously they fight light cat and dog but do get on and play well together too and I'm sure this is the same for any age gap. I couldn't have done any closer together as I had a long first labour (3 days) and then my eldest never slept I was knackered all the time, but in the end I just thought I'd go for it, if I'm up in the night with one I may as well be up with two and get it over with. The baby started sleeping through at 2 weeks and the eldest didn't sleep through til he was 5 yrs old so glad I didn't wait any longer!!!
I am now expecting my 3rd. So there will be 9 and 6 years age gap. They are both really excited, love helping pick clothes, asking questions, watching my tummy move and feeling kicks and can't wait for her to come (must say it's bought about all the akward questions from the eldest lol). This, I have got to say, is really nice too but now wondering if I should have another as age gap is big and she won't have a little play mate, but again I still wouldn't have them too close. But if I don't she will still have two older protective brothers.
The choice really is yours, there will obviously be people who say a small age gap was best for them which I can also see lots of good points in, it just wasn't for me so just see how you feel and go with the flow. You will never regret your decision as there will be too many good points to focus on. Sorry this probably hasn't helped but letting you know my views.
Good luck, Kerry, 2 boys and 26 week pink bump. x ( not looking forward to no sleep and missing my little ly ins at the weekend - bus so excited to be having a little girl)