Grammar even in Casual conversation

My Dad is a retired University professor, and let me tell you, he can be an interesting character...One trait that he has is that he won't let you get away with just anything...

And, yes I am a writer, even paid by one institution to grade other people's writing skills and have been paid by newspapers to do some writing for them, so should have some good grammar though there are certain rules, I often forget or maybe never even knew..

But, even when I wrote social website information, if it is too far off or just having a minor flaw, even in what amounts to status updates, Dad is not going to let me get away with Bad Grammar...

Truth be told, I appreciate it though I may not tell him that? How do you feel about your own grammar? Are you also on point with it, or are there times you let it lapse? If it's social conversation, are you much better, and if someone corrects you, what is your relationship with the person who gives you constructive criticism..

Let's have with this conversation, but be forthright.........