I feel like this. Things are just getting easier. Have a 4 year old and 16 month old. It's like I've forgotton the not sleeping for 14 months, the PND, the difficult pregnancy, the argueing.
I've no doubt 3 will be hard, but in my mind only v hard for the preg/new born bit, and then bit harder with all the school run/taxi business. It's so lovely when they interact with each other, I think a third would love it. Also, I am a third and DP a third. I am sorry, I am rambling.
Are you surrounded by people with lots of kids. We moved towns last year and people here seem to be having 3 and 4, not 2 ( I think the houses are cheaper!) and you do think if they can, I can.
If you have lots of love and a bit of money, a fairly stable relationship then really why not?
Dd3 is now five months. I have a 6 and 3 year old as well, I am happier than I have ever been. I'm not sure why, well apart from the obvious baby stuff but dd3 is an absolute delight, she's not sleeping through but it doesn't seem to matter , she's a screamer but this time its easier. Maybe because I know this is my last one [I think], the other two are fab with her, well if not fab definitely non-plussed, its actually been easier with the other two being a few years older, they can go to the toilet themselves, use the remote control, draw, play etc.
A terrible mistake for us to be quite honest but that's largely irrelevent to you! I was really happy with two, everyone had enough attention so never acted up, we could go anywhere do anything it seemed. Now, not so much. DDs are 5, 3 and 8mths BTW.