I don't have any regrets. There's no point regretting anything because everything that you do gives you more experience and potentially makes you a stronger person or a better person.
If you've got a desire to achieve something, then keep going until you achieve it. It's not always possible and things might change - circumstances may change or adversity or obstacles may come your way - but keep trying. I feel that I've tried to do that in my life and it's something that I've tried to pass on to my children as well.
I think that the word 'ambitious' is still used in a derogatory way when it comes to women, in a way that it's not when it comes to men. It's a generalisation because not everyone is like this, but I think there's almost a love-hate relationship going on with successful women, where you can be a little bit successful and you'll be celebrated, but don't become too successful because that seems to bring out the hate in some cases. Take one glance at social media and you can see that successful women don't seem to be treated with the same respect as successful men.
Success doesn't have a downside for me. I'm busy, but I've always been busy whatever job I've had. My very first job working in a furniture factory was bloody busy! That's just modern life. It's not a downside, you just have to be organised and keep things in perspective.