We are pretty brand specific on all of our toiletries and body products so we always bring all of our own stuff. Shampoo, conditioner, lotion, soap, body wash, face cream, etc.
Honestly I never knew people actually used hotel toiletries (unless you are staying at a true deluxe that gives true deluxe toiletries) until I came to the Dis. Everyone I know in real life takes their own products. I've asked my coworkers this question and it's the same thing.....they bring their own.