With the Iron Triangle, Xiaoge seems pretty touch-averse to me, although he will with the other two only. But I can't see him really actively enjoying sex very much. Wu Xie I read as the kind of ace who wouldn't think to initiate but would then have a perfectly fun time. Whereas Pangzi is definitely very physical, and also Extremely Poly.

I can definitely see all of those (particularly Pangzi). I tend to vary in which flavour of ace I ascribe the others (I'm weirdly non-fixed in my headcanons sometimes - one fic comes out with a, the next with b and both feel fine to me).

You wrote a lot of beautiful Guardian fanfic, being saturated makes sense to me. And I love how all the Iron Triangle are clearly very competent and yet still absolute idiots in various ways, it's a great combination.