Lovely for you OP, but sadly some ppl will not be happy with you because you are being (unintentionally) selfish in having so many children.
I have 3 children myself, so I also feel (a bit) guilty. I hadn't realised how bad the world over-population was getting when I committed to a 3rd. I also thought I could use my childless (only) sibling's unused quota! (Which is a nonsense of course.)
If I had to do it all again, what is the right number of children to have? I think it's zero. But few of us are willing to sacrifice ourselves. (Respect to those who have.)
Population growth is the biggest environmental concern at the moment (and really not much doubt about that now?) but we are often told it isn't or it'll be fine. Cos no-one in politics is brave enough to offer any solutions. As time passes tho, it really isn't fine, is it? But no-one wants to tackle the issue because we have no easy (nice) ethical way to get ppl to have fewer children. So we just hope the problem will sort itself out eventually? But it won't be pleasant when it does?
So you are free (for now) to have 6 children if you want to. And if you afford to pay for them you must feel morally fine in having a big family. But your kids will be still be using up (shared) spaces and water and oxygen... and will probably want houses and kids of their own. So it's a pyramid scheme. And one day the bottom layer will have to suffer/pay for our reckless procreation now.
Someone earlier (on this thread) said the birth rate hasn't gone up - it's that ppl are living longer. Possibly true in the UK. But the number of children being born on earth surely IS going up. Cos the more ppl there are the more kids there will be even if we all stop after 2 kids? Cos population growth is exponential in nature and the longer we live the more generations there are before the oldest layer are dead.
So the issue is more and more and more ppl ... on earth. (Mass movement/immigration will override the low birth rates we are currently seeing in some countries. So there is nothing reassuring about low birth rates say in some parts of Europe or Japan as when food and water run out or war breaks out, ppl will just move en mass?)
So yes, tho you have only a few more than the rest of us, it's still a problem cos if we all did the same as you (and I might have liked more kids myself) how will it end? Is it rational and sensible to not look into the future? And why should others (in already over-crowded countries) hold back if you won't?
Like the last straw that broke the camel's back, we are getting nearer to the edge/the point of complete environmental disaster with each birth of a child. So you must understand that your announcement re your decision to overpopulate might not be universally welcomed even by your friends and family. And strangers will be even more likely to judge your choices.
Best advice is not to brag/show off/be proud of your large family/go looking for congratulations from others? And just keep the announcement low key like you would if you had just had a pay rise when others haven't and wanted one.
You can't change your choice to have 6 kids now, but at least be aware of how selfish it was? And hope they won't want to do the same as you?
Sorry if this seems harsh advice, as I am sure you and your kids are lovely ... and I would never say this to your face. But you wanted to know what ppl were thinking last time around, so we are giving you some honest (anonymous) feedback here ...
Good luck - but stop at 6 now?!