>>151238420 (OP)
I happened to be watching random videos about Andy Dick and all the YouTube comments were "LOL THIS IS ROGER FROM AMERICAN DAD BUT IN REAL LIFE".
I sometimes like to think of Hayley as Seth's apology for failing with Meg. I'm sure as soon as it was settled that his sister would voice this sitcom daughter character, he knew he had to get it right this time.
>>151256955
Laura Prepon was the original choice to play Hayley (the inspiration likely coming from Meg being voiced by her co-star on That '70s Show.) It's impossible to imagine anyone but Rachael in the role now