If your kind wants branded (read: expensive) things after seeing a show, go to the show's website and print out some coloring pages. A number of the shows have quasi-interactive versions where the kid can pick the character, scene, something the character is holding--that kind of thing.
That said we've got a dora plate/bowl/cup set that dd pick out from the set of 3 that her great grandma had (so far, used entirely for playing with playdough, the cup is a great rolling pin), a disney princesses shirt from a neighbor (dd's never seen the related movies, but <3s her some princesses (didja know that princesses are friends with pirates and can turn people into butterflies?)), a box of Cars bandaids, a Wall-E toothbrush, and a Pororo fork and spoon that I want to get the chopsticks to match.
And y'know, when you don't have a house full of the same character, and the character stuff you do have is tucked away, it's actually pretty useful. DD is saying she doesn't want to brush teeth, I ask if Wall-E can count her buggies, she'll happily eat her dinner if she gets a Pororo fork, etc. But it does also work with other stuff, e.g. "do you want monkey socks or butterfly socks?" is generally more effective with dd than "do you want blue or pink?"
Oh! forgot about the stuffed animals, we've also got a Pigeon, Knuffle Bunny, a Baby Owl and Owly, and a classic Pooh chosen by a friend's dd when she was 3 "all babies need a ted bear!".
edited yet again: we've also got Makona and P-chan, and had Pip and Pop from Bear in the Big Blue House, but they're in the donation bag now. (didn't think of those right away because they were/are mine, and dd doesn't pay them much attention.)