I have just had number 3 who is a few weeks old. There are 2 years between each child. I work full time in a city job though have had a year off with each. We have a full time nanny and though I didn't keep our then nanny on when I was on mat leave with number 2, we have kept current one for this mat leave as we love her and want her when I go back. We do not have any family nearby so it is us and our nanny for support.
I do not feel like my family is complete and feel like I def want another! But ask me again in a few months... I know we are very lucky - we are very well off by anyone's standards and have a large house. Husband also works full time in the city but is an amazing father. We absolutely adore our children and though it is hard and we lose our patience sometimes Ithink most of the time we are good parents (!). We have so much love to give them.
However I am very wary that when number 1 starts school this year things will get harder. Also I do not think I want to work full time any more as I think I would not be able to give three or more the proper attention I would like to give them.
Incidentally I am one of three - 2 years between me and one sibling, and 10 years between me and the youngest (I am the oldest). My mother often says that having the youngest with such a big gap was like having an only (for him) as I went to uni when he was 8 and my sister moved out not long after. As a child our house was calm and tbh I don't recall ever thinking I didn't get enough attention but then I think these days we are much more child centric than my parents generation were (though they were v young when they had me). My parents are brilliant parents and I feel like I can tell them anything. They are my rock.
My husband also one of three - the youngest - but sent to boarding school age 7 and tbh I think they all have a very strange relationship with their parents but every family seems weird to your own I think. But def lots of emotional baggage.
I think financial resources and support have a lot to do with how well children of any size family do (no sh it!). Also I think prob a big difference if more children are brought into a family because parents love having children around vs a pressure to have another for some different reason (feel like they should, want an even number - ffs, was a thread on that recently - because they were one of however many and want the same).