From what I remember of the comics Tony Stark was a bit like that. In that Bruce Wayne was this deep sombre character that pretended to be a flighty playboy, Stark was a self indulgent mega rich arms manufacturer that liked his girls, his toys and his parties and found the “hero” inside of him the hard way … and was never really comfortable with it.

Bruce Wayne / Batman was quite happy to be called away from a party. Tony Stark wanted to take care of the bad guys as quick as possible so he could get back to the cocktails 🙂