There's something special about every tool you have... Sometimes it's tangible, the way it feels in your hand, the way it moves, the way it sounds... No tool is truly ideal (perfect in all situations), but there is a reason we all tend to have our favorites.
In the morning light I love my old 28mm/2.8 AIS... I even love the unique lens flare and the way it can twist the light (otherwise known as aberrations, imperfects, defects and generally things that all the newer lens designs address and newer manufacturing techniques remove). The fingerprints are the imperfections that define the importance - that which makes something unique and special and worth having. (bigger versions)