One of the studios I'd contacted got back to me and said that my portfolio was a bit design heavy for what they do. So I decided to put together a selection of some of my drawings. Since I don't have all my work with me at the moment I was a bit limited with what I could put together. It did make me think though, it's probably wise to have a selection of different portfolios to send off, since the different agencies I'm looking at vary quite a lot.