* {{Anvilicious}}: During the Bush era, Tajel constantly protested the war in Iraq. There were a few less-than-subtle Bush slams during that time as well.
* ArchivePanic: The comics have run for more than fifteen years (and still counting) and have accumulated 1000+ strips.
%%* [[SugarWiki/HeartwarmingMoments Crowning Moment of Heartwarming]]: [[http://www.phdcomics.com/comics/archive.php?comicid=683 this]]
* VanillaProtagonist: The protagonist is simply a generic representative of a grad student who doesn't even have a name. Compared to TheSlacker Mike, the constantly overworked Cecelia, the GranolaGirl Tajel and his much more irresponsible sister Dee, his character really doesn't stand out and is often interchangeable with the sea of other grad students he shares a lab with. Probably the reason why he never gets a CharacterDevelopment arc, and often gets OutOfFocus in favour of the aforementioned side characters.
* TheWoobie: Cecilia. She's constantly stressed out with her inability to write her thesis and is guilt-ridden with the increasing length of time she had to stay in Grad School, especially since her lack of progress puts a strain her relationship with her mother and boyfriend, whom she eventually breaks up with for this exact reason.
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