Have been thinking for a while... I think I DO NOT WANT Donna.
Only in as much as I know Tate will get on my nerves within 3 episodes. Also, Tennant 'n Tate? It'd be like watching 13 Idiot's Lanterns, surely? Tate will manage to make me hate and want rid of Tennant at the end of S4.
I go cry now.