The one thing that bugged me about Delphi apps on Windows, was that they used their own custom buttons on the forms (with little graphics of crosses and ticks etc.). I am not a Delphi programmer, but I always wondered why this was.
Delphi made it easy as a developer to add those icons, and they had a nice standard set named for most actions you would want a user to do in a line-of-business application UI.
Also the hello world apps for Delphi had these icons everywhere so it was "just the way" you built applications using it.