A look on someone's face that conveys a particular emotion is called Expression.
A lancet arch is a window with a pointed arch, these are considered somewhat gothic and often have stained glass or other designs on them. They were used as decoration in churches, castles, ballrooms, etc.
this is more of an opinion type of thing but i think when its soft enough to bite into (but obviously with a little bite because nobody likes mooshy pasta) and when it's not too hard to put a fork through