I've just remembered that Darren and Lilia were a lovely partnership.
Yes, they were adorable, though I can't say I remember any of their routines specifically. I can remember loving Aled and Lilia as a couple, though again, I can't remember any specific dances. Wish they were on Youtube.
I agree about the pro ballroom routines as well. I used to love Brendan and the utterly wonderful Natalie dancing together.