For a guy as proud and with such a big reputation as Tony Stark, he sure had quite a few things that Steve found fucking adorable.
For instance, his morning sneezes.
When the light hits Tony in the morning, he erupts into sneezes.
"Hah'esshi! Hah'shii! Hah'shieww!"
Steve chuckled, rising up from beside him. "God bless you, Snuffles."
"Shutup." Tony mumbled, sniffling.