Eric, I'm with you, my Rollei piques my photographic creativity every time I pick it up. The 4x5 is the workhorse and the 8x10 comes out when I have patient sitters, but the Rollei gets me creatively revved every time.
Oddly, it's the feeling of a freshly unwrapped roll of 120 film in my hand that makes me feel creative. Never felt that way about a 35mm cassette or sheet film holder. I like to put it in my Hasselblad, Rollei TLR or Fuji 6x9. Makes no difference to me.