These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Accidental Innuendo: In spades, especially if you're learning Latin and tend to make mistakes translating it, many lines can come out having a completely different meaning to what they are meant to. Even some of the properly translated lines tend towards this.
Crowning Moment of Awesome: Clemens befriends a cat that lives in the Temple of Isis in Alexandria. Said cat attacks the head of the local mafia.
Ensemble Darkhorse: Grumio. The drunk, dishonest, ladies' man of a cook who went as far as impersonating a Roman citizen. The course is used in a lot of high schools.
Ho Yay: In the second book, Clemens works at a glass shop under the employment of Eutychus. Eutychus is very easily angered by pretty much everything, yet consistently describes Clemens as "mi dulcissime" ("my very good friend!'; literally "my very sweet friend!") and greets him amicissime (in a very friendly way). The UST gets better from there.