Childfree and no regrets. But I have a deep visceral feeling in my gut that rejects the very thought of having children, so for me it's been an easy decision. I have always felt like I'm very unusual because of this. I think every child deserves to feel truly wanted by their parents (e.g. I know that my Mum absolutely loves being a Mum, and you can feel a wantedness coming from her), so to have them when you aren't convinced you want them is not fair.
I do wonder who will give a crap about me and DH when we're elderly and need support. But that isn't in my mind a good reason to have children. There is no guarantee they'll help or look after you, and it also isn't fair to expect it of them.
I don't live a high-flying life, but that's more of a personality thing than lack of means. I'm naturally quite frugal and non-materialistic. I do think I've had a very interesting and varied life though because of the freedom I've had. We have a dog, which does put some restrictions on how easily we can do some things, but nowhere near as much as having a child. We are quite outdoorsy so just take the dog everywhere with us.
The main thing I love about being childfree is that I have always been financially independent. At no point since starting my career have I been dependent on another persons income to get by. I feel very empowered by that, especially as you see so many threads on MN where women are stuck in horrible relationships because to leave would be financially devastating. I know you can be financially independent and have children, but certainly when the kids are young I don't know any women personally who fall into that category. I think it takes a heck of a lot more effort to obtain that financial independence for women with children as their is so much compromise and juggling to do.
I do feel incredibly grateful to all the people who do have children. If no one had children, society would cease to function eventually. My nieces, nephews, friends children are the people who will run society when I am old. Without them we'd all be screwed.