I work part time and find it a really good balance. I feel quite lucky with my little lot in life, tbh. It's taken me quite a long time to find it and I have had to wait out new job opportunities at work, but it was absolutely worth it. I'm a single parent and receive no maintenance so it's all on me, but I've found a way to make it all work...eventually! 
I would be a bit better off financially if I had guaranteed full time hours, but dd would need to be in childcare for that to happen and I suppose I personally feel like it's more beneficial for me to be with her at home after school whilst she's still young. She's my only child and I want to be around for as much as I can. Not to mention how much I would end up spending on childcare. At the minute, my mum drops her off at a nursery run breakfast club for two mornings a week due to my very early work starts. They make her something to eat, let her have a play and then bus the children to their schools. My mum also takes dd for me on a Saturday morning so that I can do an early morning shift and I pick her up at lunchtime. During the week, my entirely too lovely and understanding boss puts me down for overtime that runs between school hours. I'm able to pick dd (7.5yo) up from school every afternoon and drop her off for 3 of the mornings. I never work any later than 2.45pm and I can do as much or as little OT as I want. During the school holidays, I'm either on annual leave or my mum looks after dd for me.
Financially speaking, I don't bank a great deal. But it's enough to pay the rent and bills and my overtime affords us a few little luxuries. Some months are tighter than others, but I find a way to work it one way or the other. Dd needs or wants for nothing. It's always been important to me that she sees me working. Whilst I am only part time, she understands why mummy needs to work and I think it's good for children to understand that their parent(s) have to go to work. By the same token, I also believe children can benefit from having mum or dad around a little more if possible.
I feel like I've been quite a strong role model for my little girl under the circumstances, but that's mainly down to my incredible mother. I was raised to be independent and to stand on my own two feet, and I am/do. My mum has always taught me the value of working and being financially independent from a spouse/partner. Even if I married a billionaire tomorrow, I would want to keep up part time hours somewhere - just so that I had a little safety net squirreled away. Nothing in life is guaranteed - it's a lesson I learned young 
I suppose when it comes down to it, you just need to do what's right for you and yours. If I suddenly found myself in dire straights tomorrow, dd would be in childcare every morning/afternoon possible whilst I grabbed every slice of OT I could get my hands on. Fortunately, that isn't the case and we can get by on a little less just now. As soon as she is able to take herself to and from school, she won't need or want me here quite as much 