I chose gentle parenting nearly 18 years ago after an abusive childhood, I decided I wanted a peaceful family life with respect and kindness being at the core of our family.
Fast forward to now, it has worked out very well for us. My dc are exceptionally kind and compassionate young adults, they have noticeable quiet confidence and high self esteem. They have high standards of the people around them, aggressive or toxic friends don't last for long and both have a very strong bond with dh and I. Our teen years have seen no drinking, drug use or other harmeful things. I don't know whether that is the gentle parenting or we just been lucky.
I combined GP with early attachment parenting, and mindfulness which is not something people talk about often, so they always felt listened to and that I was always present and focused on them, and the world around us.
I have not been a permissive parent though, we have strong boundaries around screen use, violent films etc. As the years have passed I have found I don't need to tell them, they are already work out what is not good for them and adjust their own behaviour. I raised them to love wildlife, life long vegetarians and to follow their own dreams/choices. I have made a point of not interfering/pushing, as a result they are quite self motivated.
It did not come without conflict, my family thought we were 'weak' parents and that the dc would run riot eventually and 'rule the house' (This was proved totally inaccurate btw and they do acknowledge that they have turned out very lovely people who did not feel the need to run riot because they were listened to) other people say it is 'pandering' to ask them where they want to go/eat/holiday/days out but I see it as respectful not pandering. Lots of work men telling me I would pay the price when dd was 15, they could not have been more wrong. I think this kind of parenting brings out insecurity for those that have parented differently and maybe feel bad about some of their own actions.
My dc are not perfect, nor do I want them to be. We have very few arguments, if they want to change something they know to talk and debate, that gets results here not shouting.