My natural hair has not been curly but fairly straight. It could be that my hair is turning grey and the texture is different than when I was younger. What's new is I haven't had a hairline for many years so maybe my new "normal" is a little curly. I wouldn't call my donor hair as "curly" but I guess it does have a slight bend to it.
I used a top-tier surgeon who is very highly recommended on this and other forums as well. This is not a "mis-angled" issue as it's not the angle of the hair but the hair itself having a slight bend to it. You might call it "frizzy" but I'm seeing a slight curl to the hair. Yes, I am VERY happy with the results - better than expected - very natural, dense and thick. I can try to provide pics as well.