I like Steve topping because i have a weakness for 'trust' fics. Tony doesn't open up to many, Stane ripped his heart out - all this contributes (in my mind) to a very wary Tony. I love reading about Cap working with Tony to get through to him, to show him he can be trusted, and then to read Tony letting him have the ultimate symbol of trust = himself.

But that's just my two cents. ^^