I remember something about illustrator that i hate
strokes. In order to change where the strokes sit on an object (in front, in back, off set, etc) you need to do about 4-9 STEPs (depending on route you go) for each object to do so. In corel it's literally 3 clicks. (outline, check box, apply or ok) and you can do for an entire group of objects if you want. I still also dislike how point cleanup uses multiple tools to do the same thing corel does with one cursor tool (click to select, double click to add or delete points, 2 points deleted averages the 2 points as a curve, right click has all the options for the points, etc) and the way seperate point manipulation is handled in illustrator is sometimes as odd as the smell in my great aunts condo ... same way it's handled in flexi ... but that isn't a good thing.
Sadly, the part that irks me more than anything about corel ... and is sometimes a breaking point in the software is STILL converting outlines to an object. I can't count how many times in the past year that my software has completely locked up because of that. makes you want to stab something fluffy and cute. I can't believe they have yet to (or know how to) fix this issue that existed since corel 8. and make a smooth tool for the love of science! ... if illustrator had it since the beginning of the program ... i'm sure others can do that too.