The unpredictable weather
The small classes that fill up quickly during registration
You can sometimes feel like you're always in school.
It seems like long-term assignments are due at the same time as research papers.
It becomes confusing that class standing goes by credits and not by year.
The books can turn out to be very expensive. Art classes are probably the most expensive because of the supplies.
Going out all the time with people from the University may sometimes isolate you from meeting other interesting people.
Late evening classes
Life in Paris is expensive.
There are rumors that go around sometimes. You might hear the strangest things, but they'll blow over in a few days.