About Faith and Angel - I definitely can imagine them in a fling. Remember how Angel refused to rule out his possible relationship with Faith if it weren't for Buffy? And that was even before he got his own show. And he actually has more common with Faith than with Buffy. Ultimately, however, it would fail, as mutual support on the redemption path requires another kind of relationship, I would say - one might even say, on a level above physical love. In any case, though, it wouldn't be as messy as Spuffy in S5-6.