No, I don't think so, Uni - he used to collect typical kid things as a child, i.e. fridge magnets, but I don't think he has any hobbies like that now.
To be honest, and it's sad to say this, but I don't know him all that well as we have usually been living in different countries most of his life - or else he has been in Brisbane and we have been in Melbourne so don't get much chance to actually meet up.