I'm playing a brief catch up here so next up are my thoughts on guest stars in Nu-Who.
If Bernard Cribbins counts as a guest star, then hell yeah he gets the nod. Three times over for being great.
Otherwise, Derek Jacobi, Lesley Sharpe, Jessica Hynes.
But does that really cover it?
There have been some lovely guest turns in the series: I loved River Song enough to want to see her re-appear in a story with her older (next) Doctor; Ann Reid was delicious as Mrs Finnegan; Simon Callow is perfectly camp as Dickens. I'd even praise Mark Gattis's turn as Professor Lazarus (though not the grotty CGI monster).
Again, too much to choose from...