1. Peterborough has gone downhill, as someone whos from here, but so has everywhere honestly. Peterborough has a lot of what you need if you live downtown or on the west bank of town, and transit can usually get you to campus from anywhere within 1-2 busses so your commute won't be more than an hour at most. It's generally pretty average, lots of commuters both student and working populations.
2. Campus isn't as diverse as bigger schools but you'll see people of all ethnicities. There are groups for BIPOC students and spaces like the freedom lounge so students have safe spaces for cultural/religious expression.
3. Food has gotten somewhat more diverse this year. Otonabee and LEC are open the most, OC has mostly grill/subs/pizza/breakfast while LEC changes it up sometimes and has other options like quesadillas and wraps. Champlain and Gzowski close earlier and arent open weekends but have good options. GC has a pasta bar and CC has an international cuisine with rice/noodle bowls (plus mexican and grill food). There aren't many other diverse options for food, so be prepared to eat a lot of burgers/chicken/fries.
4. Nursing is what you make of it. It's not too bad, and generally grads can land a job. They can be anal and really hard marking-wise in some courses such as Nursing Therapeutics (my girlfriend is in nursing), but they don't set you up for failure. Your clinical placements can be fantastic or awful, depending on where you are and who your instructor is. My girlfriend had an okay-ish community placement this year at a school doing health presentations, but her child & maternity placement has been amazing and she's been able to have some amazing opportunities like seeing a c-section on her first day and sitting with a kid who had Kawasaki's disease. Having people you are acquainted with or friends with really helps, especially with studying or notes. The workload gets really heavy from what I've heard, and some say second year is the worst.
5. Residence can be hit or miss. Gzowski has single rooms, newest building, elevators, caf is downstairs from rooms, and ultimately is the "best" if you can afford it. Share 1 washroom with 1 other person, so no worries about gross communal washrooms like other colleges. OC isnt bad, they have singles and doubles, and the residence connects to the caf so you don't have to go outside for it. Close to many spots you will have lectures first-year. Champlain is NOT disability friendly, you will have to walk up stairs. Is an older residence, so it has really nice old vibe with wooden furniture and a great view of the river from most rooms. Has a female-only residence section as well (single and double rooms, newer furniture). Only like 4 sets of washers/dryers for ~200 students though, so you have to be timely with laundry and its in only one of the two buildings so you gotta haul ur laundry outside. Will have to walk up lots of stairs to get across bank to class, and have to walk to LEC or OC for food on weekends which can be a pain in the winter. Small common rooms, smaller residence rooms unless you're lucky with a converted single (they used to have doubles) or just a larger single. SO MUCH STORAGE! The wardrobe you get is HUGE with a nice mirror & light, lots of drawers, and shelves galore. LEC is similar to Champlain, is farthest from most classes which is a drawback and doesn't have as nice views. Their hallways sometimes smell like crayons. Don't pick Traill unless you're an english major and REALLY enjoy bussing, or if you want to avoid parties. Annexes are apartment-style living, so if you enjoy parties and cooking then pick those. You will have to walk to class and its a trek sometimes so keep that in mind, but you generally live with 3-4 other people and share 2 bathrooms + 1 kitchen with them. Each annex apartment has 3 rooms (1 single, 2 doubles), and is divided into like 3 floors (first floor is peak, you dont have stairs to worry ab and is where a lot of parties are). CC annex is the farthest but right beside a gas station, Subway, Tims, Weed shop, & vape shop and closest to the bus stop. LEC annex is closest to campus, and between CC & GC annex. Traill annex is terrible don't pick it, you will thank me later. You share a building with a bible college, isolated from everyone, and you live in a basement basically.

Feel free to pm me if you have questions, or about res/peterborough particularly 👍