Your lecturer is correct. Type designers spent weeks, months, some even years fine tuning, perfecting and tweaking each individual font so that it looks best in a sentence or used as an individual character. Therefor please use it as it was designed. The only thing you can change is the scale/size. This is how I can tell whether a person is a desktop publisher versus a true graphic designer.

Let me also add. To break the rule you must first know the rules.

Type in a book or body text is a no no to any form of distortion. You want it as legible as possible otherwise you won't be able to convey the message to the readers.

There are many graphic designers and all of them has their own individual styles. But at the end of the day, and if you notice carefully there is always a reason and rational as to why they break a rule in the first place i.e distort a font etc...



If you look at the poster above (not my work, just some random image to illustrate an example), it may come across to you that most of the fonts are distorted. But if you examine it closely you'll realize that it is actually perspective distortion. In this case it works because perspective is around us. The designer only breaks the rule because he knows the rules of perspective as an artist/designer in order for him to convey a message across visually.

By doing this, he achieved greater impact and successfully engaged his audience as opposed to a paragraph of text with the same words. 

My 2 cents.