You're honest.
There are few really good parents but you wouldn't believe it if you look on Facebook (and other social media), people I know whose standards fall far below my own average standards patting each other on the back about how great their parenting skills are.
And you probably are a very good parent.

I think you hit the most important point with the name of this group. If we as parents are truly honest, then we will all be painfully aware of our short comings. We do the best we can with the information we have at the time.

We also fall into the trap of being selfish at times. Honestly recognizing the difference between poor parenting at the time and poor parenting in retrospect is very important. There is no reason to beat yourself up when you did the very best you could. If you're able to recognize could have done better and use that to be a better parent and person, then I'd say you are doing a fantastic job and setting a good example.

You want to be a nice mum that itself makes you a nice mum! That's true you can't make everyone happy at the same time. You have to choose between available options!

I can't speak from personal experience. But if you ask the kind of questions that you do in your post, I think you are probably an excellent mum.

Parenting is a huge learning curve all the way and when you finish your apprenticeship you retire!

Too hard on yourself. I have a child with special needs. Second guessing is a way of life

I think everyone has moments of self doubt. But those moments seem to feel more important when you are a parent because you realize that you are responsible for someone's life and well being. It is hard to comprehend what can be done in simple actions sometimes with the effects only appearing years later. So in a long answer... yes we all have doubts and I don't think anyone feels like they are a great parent all the time.

Don't know about great but I think that I've been adequate. My philosophy is to treat my kids like people. Explain why they are being punished, praise them for doing well, apologize when I make a mistake.
They all still seem to like me and the youngest is 21... :)

All kids raised and I guess the only thing that matters in the end is that they all well adjusted adults, doing splendid on their own and have empathy and respect for orhers.

You can never keep all f your children happy at the same time. There is always jealousy as well as sibling rivalry. You sound as if you are a very good mum indeed. All that you and Jon can do is instill upon them your own values. And then hope that they learn the lessons that both you and Jon have tried to teach them. ☺☮

Nobody is perfect, just try to do your best.

Just do your best and things will work out

How old are your kids?

Even though I am not a parent, but I think expecting kids to appreciate what parents do for them is expecting monkeys to fly the airplane. :) cheer up :)