As a follow-up question, in a secondary would it be risky / unwise to list names of certain professors you would be working with (especially in schools that ask "why us" or research-focused essays)? It seems like a double-edged sword, in that you want to show you've thoroughly researched the school and its opportunities, but at the same time don't want to run the risk of having a reader run into a name they're not as fond of.
Also, if you've talked to particular students from that school about specific aspects, is it fine to just say "I've spoken to a previous M2 and have learned X, Y about this school'?
Thanks!
My general recommendation is to find a book called "Getting What You Came For" and reading the first two chapters. Yes, it's fine, but there's a bit of complicated etiquette about it that would take too long to list all the nuances where the book does get in-depth about that (and I have found it to be sound advice personally and what I recommend others when dealing with this). In terms of "not-fond", that's actually something that you'll have to piece out.
I'm a bit more pessimistic than most as I've had to play mediator to some of the more petty disputes (not just because of professional rivalry) between faculty on scientific review committees and editing journals. Scientists express the gamut of humanity, and their successes are completely independent of their character. From running the adult day-care center one too many times as administrator, my general advice is if you do manage to piss off some faculty member by just name dropping, that relationship was probably not meant to be, because it'll come out eventually, and since you have to have a long-term relationship, you want to know these things up front. This is very different advice than I tell people when they go for R01 or R32's, where you write of your relationships like resumes, completely tailored if necessary to even slight hints of conflict, because what actually gets funded isn't necessarily the most innovative projects, but the least controversial among the reviewers (as in, if you provoke a strong enough negative reaction from a reviewer, I've seen that doom more good, innovative, but high-risk projects than quotidian yet another X proposals). And proposals are usually one-off affairs, no continuing relationship necessary.
Sorry for the mixed message, but it is as you suspect. It's a matter of your character and values on how you view those manners as risks.