bluedog- when the ask canon or nikon - I say both...or I say neither...depends on what camera(s) I am using that day. I love shooting in older vintage cameras.
Might be an Rb 67 or a TLR or rangefinder.
I don't worry abnout the question of nikon or canon or film or digital...I changed my mindset to I am an artist....the camera , a tool... the film....is the magic...or the developers or papers are the magic depending on your point of view. I think they are just trying to find common ground or see if you are using "pro " cameras as this is what they see on tv and in magazines. Maybe they want to see if you have the same camera they have?
Either way - I do not let it bother me and in fact it makes for a great conversation starter. I never really stopped shooting film. For deadline photojournalism -I shoot digital, but for projects that do not have a deadline, I shoot film, mostly black and white,
If it makes your client nervous that you are shooting "only" digital or "only" film- go ahead and shoot both. I have found it is about educating the client and looking for folks who are a bit more of the "artsy " type;
and not the hurry up I need in 3 hours and I need it cheap type. I joke to them-- art is like a fine wine ...it takes time, say it with a big smile ! I am also branding myself more of an artist and art gallery than a photographer with a photo gallery. Sutle shift in midset, but i think it attracks a different type of client. I am looking for folks who are open minded and artsy, and want something a littlebit different and who will pay more for hand crafted photographs made by the artist in the Outer Banks. [discalimer I have relocated for the winter months to be with family- and I am not printing right now- in the OBX]