No, that's perfectly normal! It actually suggests you have a healthy relationship with your dad.
Your dad is generally the first man you ever love and that loves you back - he builds a foundation and sets a precedent for how the opposite sex should treat you.
I'm not really attracted to men who look like my dad but I am very much attracted to men with same sense of humour, interests, and demeanour as him. I grew up laughing and enjoying learning about everything he had to teach me. It makes me feel comfortable, and people tend to have a preference for things that they're actually familiar with, so it makes sense! He was a great dad to me and a great husband to my mom, so I tend to assume that those similar to him would be the same to me/my daughter.