I do not mind either...straight or curly, I do feel that the one you were given is the one you look best in. So, if you were born with curly hair...I feel, chances are you will look best that way or vice versa.
I was born with very straight hair but even until today, I just love and admire people with naturally wavy and/curly hair. It is so beautiful to me. So, when I was about 5, I made my mom curl my hair etc...it took hours and hours...and eventually, it was curled and I was so excited as we were going to watch The Nutcracker Prince at the theater.
So, all was going good...until I got out of the car and a strong gust of wind came along and blew my new curls straight out of my hair. I was devastated! I never tried curling it again. (-: But I still admire curls and once, in fact, fell for a boy with unruly curls.