The fact that it's definitely possible to get the idea that Ten was smitten from what was on the screen is what makes it reasonably simple to write him in love; my stumbling block is always Donna and how to get her to the point where she'd admit to thinking about him "like that". Which is why I vowed I'd never write a "first time" fic for them.

Oh god, I know! That's really why I've very rarely written Ten/Donna because Donna gets a bit stubborn with my muse when I try to. ;) I was able to sort of frame it as a comedy once in Quid Pro Quo, where Donna was both curious and a bit under-sexed at the time and then Ten was able to get things to happen between them using that advantage, but usually...yeah.

I think that's why I've usually stuck to writing kinkmeme flashfic about them, because I don't have to worry about setting up things too much. It's sad too, because though Martha/Ten is probably my favorite pairing, I think that Donna/Ten probably had the most UST and I really wanted them to get together (off-screen or subtly, of course).