I'm not a parent myself. However, I have a little something to contribute. The woman I was originally born to (I refer to her as my birth mother) did not have anything to do with my upbringing. He gave birth to me, took care of me until her c section scar healed, then was out partying and making poor decisions with her life all day and night every day. By the time I was 15, I realized that I knew nothing about my mother and she had taught me nothing about life. I only saw here when she was passed out or going out. At that time, she began dating a "man" (I'm using that term loosely because he was anything but a man) who didn't like the idea of her having a teenager at home (my older siblings had moved out) so my birth mother told me to pack my things and find somewhere else to live.
At that time, I was taken in by my best friend's mother (I refer to her as my Mommy). She taught me everything I know about life and what's right or wrong and how to love and care for others. I attribute everything that I am today to my Mommy because she had a big enough heart to let me in and make me who I am today. She calls me everyday to remind me how much of a blessing I am to her and how much she loves me. I think Mommy was a great parent. She put her foot down when she had to, but gave me enough breathing room to develop and discover myself. The support she gave is another thing that makes a good parent.
I'm sorry. I'm rambling.
The only real way you can know if you're a good parent is to look at your kids.