Peter Capaldi, can't say enough nice things about him.
Took my young nephew who lives in Wales to Cardiff when I knew they were filming DW, and even though it was pissing it down this fella was signing for everyone and chatting and photos with whoever asked, and didn't once looked annoyed as more people were turning up, even though he looked frozen to death.
Friends of mine also live in Cardiff and met him recently (they took the sproglings with them, but I think they were just a pretext
). They also report that Capaldi was charming and seemed genuinely delighted to be chatting to fans, even though it was cold and drizzly and he only had a light jacket on. Poor man must have been shivering inside.