I tried Hugh Laurie, Robert Sean Leonard and Jennifer Morrison last year. Got something back from Jennifer (authentic, I think, but with a sec inscription) and Hugh Laurie. Unfortunately I wrote him when he already had stopped signing authentically so I only got a PP which you will also receive when writing to him via his agency and most likely also when trying him VV...
I have never seen a success for Robert though. Jesse Spencer also seems to be a good signer. {thumb2}

Who is the best from H O U S E that replys back that doesn't give out PP autographs and what ones can I write to that are good at responding back without a PP autograph?

Mandy