ITT: we share our clichees of students of different subjects, BUT please only based on personal experience, n >> 1. Bonus points for stating your own field and country. I'll start.
Computer Science - badly bearded, won't let you finish talking because what they have to say is more imporant. Sad thing is, they often are right. This is more the "linux" type; the "theoretical cs" type acts exactly like Math (below). There also seems to be the Business-type, which always wears a light blue shirt, is very unlikeable and downright scary for me and the reason I already hate the working world while at university (I am personally very dionysian though).
Math - just quiet, nice people. Like cats. Maybe a little too introverted; I often seem to scare them away. Curious lack of interest for personal gains.
Physics - very arrogant ductus, talk to you like they ate wisdom for breakfast but are kind enough to sacrifice their valuable time explaining things to you mortal. Seem to be studying this out of an overattachment to the "smart kid in class" role in high school and it shows.
Also act like what they do is the only imporant thing, when in reality it obviously is artificial superintelligence. (Not to say that physics may not play a part in finding better computational substrates, but this can be said of every field)
Biology - nice, easy going nerds (in the positive sense) who just like their subject.
Engineering - Jocks (not in a negative way, they just like normie stuff and big hard cogwheels - and who does not?)
Electrical Engineering - hardly recognizable; seem to be just very normal, a little smarter than average people. Also many are from muslim countries.
Cognitive science - lesbians
This comes from a CS student, from Germany. Please don't be offended if I insulted the students of your field, I very likely did not mean you.
What I am interested in is psychologists, sociologists, philosphers, cognitive scientists and of course everything else.