Yes AMS Euler is very nontraditional as mathematical typesetting goes — to put it in terms of Zapf's oeuvre, it's not Palatino or Optima but rather Zapfino. :-) Looking at what was written/expected before it was created, it can probably be seen as somewhat of a disappointment.
But it was created to mimic the style of mathematicians writing by hand on a blackboard, and I must say that in the book Concrete Mathematics (reading which was, in retrospect, one of the highlights of my life) it works very well, going well with the book's conversational style, the irreverent margin graffiti by students, etc.
But it was created to mimic the style of mathematicians writing by hand on a blackboard, and I must say that in the book Concrete Mathematics (reading which was, in retrospect, one of the highlights of my life) it works very well, going well with the book's conversational style, the irreverent margin graffiti by students, etc.