A Better Option
A better approach is to go for similar body type/hair and eye color; to read the profiles of lots of donors with an open mind; and choose someone you feel some rapport with. You want to feel good about your donor--your attitude towards her will be conveyed to your child.
And don't forget, most scientists agree that personality is formed equally by nature and nurture and you are going to have a profound influence on who your kid grows up to be from day one.
I'm a former infertility patient, psychotherapist and author of Unspeakable Losses (WW Norton and HarperCollins).